News: Centre WACQT related to Chalmers University of TechnologyWed, 07 Dec 2022 05:39:19 +0100 of Enterprise and Innovation eager to learn more about quantum computers<p><b>​​On November 30th, a 20-person delegation from the Swedish Ministry of Enterprise and Innovation visited the Wallenberg Centre for Quantum Technology at Chalmers University of Technology.​</b></p><div><span style="background-color:initial">“We see the potential of quantum computers in very many areas of application. And as we know that the research environment here is fantastic, we wanted to come here and listen to the experts,” says Fredrik Sandberg, digital and tech expert at the Ministry of Enterprise and Innovation.</span><br /></div> <div><br /></div> <div>The visit started with WACQT director Per Delsing giving an overview of WACQT and the quantum computer project, while WACQT principal investigator Katia Gallo spoke about the European Quantum Communication Infrastructure (EuroQCI), which WACQT would like Sweden to become a part of. Funding from the EU is already granted, but the required Swedish co-financing is still not there, according to Gallo.</div> <div><br /></div> <div>The visit finished with a tour in the lab, where the doctoral student Christopher Warren showed the quantum computer and explained its working in more detail.</div> <div><br /></div> <div>Text and photo: Ingela Roos</div> <div><br /></div> ​Tue, 06 Dec 2022 00:00:00 +0100 the energetic cost of timekeeping<p><b>​Five research groups across Europe are now joining forces in uncovering the ultimate limitations of timekeeping to assess whether precision measurements can become more energy efficient. The €2.9 million project, named ASPECTS, is part of the EU Quantum Technologies Flagship.</b></p><div>​Measurement devices exploiting quantum properties can provide very high precision. A well-known example are atomic clocks which provide us with very precise timing and timestamps used in satellite navigation. Such precise measurements cost energy – the more precise, the higher energy cost according to recent discoveries in thermodynamics. But potentially quantum phenomena could be harnessed to make measurements both very precise and energy efficient.</div> <div> </div> <div>This is what the researchers in the ASPECTS project will investigate.</div> <div> </div> <div>“We will leverage our expertise in superconducting circuits to build a set of novel, one-of-a-kind quantum machines. By watching these machines at work, and carefully measuring fluctuations in their output, we will experimentally unveil the trade-off between precision and efficiency in small quantum systems,” says assistant professor Simone Gasparinetti, principal investigator at Chalmers University of Technology.</div> <div><h2 class="chalmersElement-H2">Quantum computer technology</h2></div> <div> </div> <div>The technology used to build the quantum machines is the same as used in Chalmers’ project of building a large quantum computer, that is, superconducting circuits operating at microwave frequencies at very low temperatures.</div> <div> </div> <div>“Our solid experience in this technology put us in a very good position to realise the proof-of-concept experiments of ASPECTS,” says Gasparinetti.</div> <div> </div> <div>One of the machines that Gasparinetti and his colleagues will build is an elemental quantum clock that ticks when placed in-between a hotter and a colder bath.</div> <div> </div> <div>“This is the simplest possible clock. By building it, we will be able to pinpoint the true energetic cost to keep time,” Gasparinetti says.</div> <div><h2 class="chalmersElement-H2">Ground-breaking advance</h2></div> <div> </div> <div>By experimentally assessing the energy cost of timekeeping and readout, the ASPECTS team aims to demonstrate so-called quantum-thermodynamic precision advantage. Such a ground-breaking advance could allow quantum sensors and other measurement devices to operate at higher energy efficiency than would be classically possible without sacrificing precision.</div> <div> </div> <div>In timekeeping, space-based applications would in particular benefit from energy-efficient, miniaturized clocks, but also nanoscale systems where heat dissipation is unwanted. Improved energy efficiency in quantum measurements in general is also important in the long-term to ensure environmental sustainability when scaling up quantum technologies, for example quantum computers.</div> <div> </div> <h2 class="chalmersElement-H2">The ASPECTS project</h2> <div>ASPECTS is a European Quantum Technologies Flagship project. It has a length of three years and funding of €2.9 million.</div> <div> </div> <div>The key milestones of the project are:</div> <div>•    To probe the ultimate thermodynamic limits on quantum clocks by building autonomous quantum clocks and measuring the energetic cost of timekeeping in the quantum domain;</div> <div>•    To measure the thermodynamic cost of qubit readout;</div> <div>•    To implement the first proof-of-principle demonstration of a quantum-thermodynamic precision advantage.</div> <div> </div> <div>The project is coordinated by Professor Mark Mitchinson at Trinity College Dublin. Other participating universities are Chalmers University of Technology, Technical University of Vienna, University of Murcia, and University of Oxford. </div> <div><br /></div> <div> </div> <div><strong>Text and photo:</strong> Ingela Roos<br /></div>Wed, 30 Nov 2022 15:00:00 +0100 and security in focus for the new Assistant Professor<p><b>&quot;I am attracted by the open discussion climate and look forward to forming a new team in cryptography,&quot; says Elena Pagnin, one of Chalmers's 15 new research talents.</b></p>​<span style="background-color:initial">For the fifth time, Chalmers has made a major investment in attracting sharp research talents from all corners of the world. The campaign was very successful; nearly 2,000 eligible people applied for the 15 positions as Assistant Professors.</span><div><div><br /></div> <div>&quot;It is extremely gratifying to see the large interest in Chalmers internationally and that so many research talents want to come to Chalmers to build their future career,&quot; says <b>Anders Palmqvist</b>, Vice President of Research.</div> <h3 class="chalmersElement-H3">Security a significant challenge</h3> <div>One of the 15 is <b>Elena Pagnin</b>, Assistant Professor with a focus on <a href="" title="link to wikipedia">cryptography</a>. Her position is linked to the Information and Communication Technology (ICT) Area of Advance, and director <b>Erik Ström</b> welcomes her warmly:</div> <div>“Security, in a broad sense, is one of the major societal challenges of our time. With the recruitment of Elena, Chalmers' competence in cyber security, specifically in cryptography, is strengthened. I expect Elena to advance the research front in crypto as well as drive cross-disciplinary research on effective cryptographic solutions for security problems in e.g., transport, health and technology, production, and energy.”</div> <h3 class="chalmersElement-H3"><span>Loving the science</span></h3> <div><span style="background-color:initial">Elena Pagnin will work at the Department of Computer Science and Engineering (CSE), a familiar place since her time as a PhD student at Chalmers. After a few years as a postdoctoral researcher in Aarhus, Denmark, and Associate Senior Lecturer in Lund, she is looking forward to her new job:</span><br /></div> <div>&quot;I love cryptography and provable security. My primary focus will be on the design of digital signature schemes with advanced properties such as homomorphic signatures, extendable ring signatures, and signatures with flexible verification. I will also work on efficient and privacy-preserving protocols for concrete use cases including location proximity testing, server-aided data sharing, and secure data deduplication.&quot;</div> <h3 class="chalmersElement-H3">​A rising star</h3> <div>The Head of Department <span style="background-color:initial">of Computer Science and Engineering</span><span style="background-color:initial">, </span><b style="background-color:initial">Richard Torkar</b><span style="background-color:initial">, is thrilled that Elena accepted the offer to come back to Chalmers and create her own research group:</span></div> <span></span><div></div> <div>&quot;Dr Pagnin complements our cybersecurity environment well, and given her credentials, we expect her to succeed greatly in the years to come. I am personally convinced that one day she will become one of our brightest stars. I look forward to following her career in the years to come.&quot;</div> <h3 class="chalmersElement-H3">Open climate and visibility</h3> <div>Elena says that she was drawn back by the vibrant and lively environment at Chalmers and that there is an open climate for discussions about interdisciplinary research:</div> <div>&quot;People are positive and I appreciate the honest advice I get from the network. In addition, Chalmers' visibility, not only in Sweden but also internationally, is a bonus.&quot;</div> <div>&quot;And now, I look forward to establishing a new team of cryptographers in Sweden. We can do that, mainly because of the good cooperation within Chalmers and with our close contacts in the industrial sector,&quot; concludes Elena Pagnin.</div> <div><br /></div> <div><a href="" target="_blank" title="link to Elenas personal webpage"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more </a></div> <div><br /></div> ​<br /></div> ​Wed, 19 Oct 2022 03:00:00 +0200 control over captured light<p><b>​Researchers in quantum technology at Chalmers University of Technology have succeeded in developing a technique to control quantum states of light in a three-dimensional cavity. In addition to creating previously known states, the researchers are the first ever to demonstrate the long-sought cubic phase state. The breakthrough is an important step towards efficient error correction in quantum computers.</b></p>​“We have shown that our technology is on par with the best in the world,” says Simone Gasparinetti, who is head of a research group in experimental quantum physics at Chalmers and one of the study’s senior authors.<br /><div><br /></div> <div>Just as a conventional computer is based on bits that can take the value 0 or 1, the most common method of building a quantum computer uses a similar approach. Quantum mechanical systems with two different quantum states, known as quantum bits (qubits), are used as building blocks. One of the quantum states is assigned the value 0 and the other the value 1. However, on account of the quantum mechanical state of superposition, qubits can assume both states 0 and 1 simultaneously, allowing a quantum computer to process huge volumes of data with the possibility of solving problems far beyond the reach of today’s supercomputers. </div> <h2 class="chalmersElement-H2">First time ever for cubic phase state</h2> <div>A major obstacle towards the realisation of a practically useful quantum computer is that the quantum systems used to encode the information are prone to noise and interference, which causes errors. Correcting these errors is a key challenge in the development of quantum computers. A promising approach is to replace qubits with resonators - quantum systems which, instead of having just two defined states, have a very large number of them. These states may be compared to a guitar string, which can vibrate in many different ways. The method is called continuous-variable quantum computing and makes it possible to encode the values 1 and 0 in several quantum mechanical states of a resonator. </div> <div><br /></div> <div>However, controlling the states of a resonator is a challenge with which quantum researchers all over the world are grappling. And the results from Chalmers provide a way of doing so. The technique developed at Chalmers allows researchers to generate virtually all previously demonstrated quantum states of light, such as for example Schrödinger's cat or Gottesman-Kitaev-Preskill (GKP)states, and the cubic phase state, a state previously described only in theory.</div> <div><br /></div> <div>“The cubic phase state is something that many quantum researchers have been trying to create in practice for twenty years. The fact that we have now managed to do this for the first time is a demonstration of how well our technique works, but the most important advance is that there are so many states of varying complexity and we have found a technique that can create any of them,” says Marina Kudra, a doctoral student at the Department of Microtechnology and Nanoscience and the study’s lead author.</div> <h2 class="chalmersElement-H2">Improvement in gate speed</h2> <div>The resonator is a three-dimensional superconducting cavity made of aluminium. Complex superpositions of photons trapped inside the resonator are generated by interaction with a secondary superconducting circuit.   The quantum mechanical properties of the photons are controlled by applying a set of electromagnetic pulses called gates. The researchers first succeeded in using an algorithm to optimise a specific sequence of simple displacement gates and complex SNAP-gates to generate the state of the photons. When the complex gates proved to be too long, the researchers found a way of making them shorter using optimum control methods to optimise the electromagnetic pulses.<br /></div> <div><br /></div> <div>“The drastic improvement in the speed of our SNAP gates allowed us to mitigate the effects of decoherence in our quantum controller, pushing this technology one step forward. We have shown that we have full control over our quantum mechanical system,” says Simone Gasparinetti.</div> <div><br /></div> <div>Or, to put it more poetically: </div> <div><br /></div> <div>“I captured light in a place where it thrives and shaped it in some truly beautiful forms,” says Marina Kudra.</div> <div><br /></div> <div>Achieving this result was also dependent on the high quality of the physical system (the aluminium resonator itself and the superconducting circuit.) Marina Kudra has previously shown how the aluminium cavity is created by first milling it, and then making it extremely clean by methods including heating it to 500 degrees Centigrade and washing it with acid and solvent. The electronics that apply the electromagnetic gates to the cavity were developed in collaboration with the Swedish company Intermodulation Products.</div> <div><br /></div> <h2 class="chalmersElement-H2">Research part of WACQT research programme</h2> <div>The research was conducted at Chalmers within the framework of the Wallenberg Centre for Quantum Technology (WACQT), a comprehensive research programme, the aim of which is to make Swedish research and industry leaders in quantum technology. The initiative is led by Professor Per Delsing and a main goal is to develop a quantum computer. </div> <div><br /></div> <div>“At Chalmers we have the full stack for building a quantum computer, from theory to experiment, all under one roof. Solving the challenge of error correction is a major bottleneck in the development of large-scale quantum computers, and our results are proof for our culture and ways of working,” says Per Delsing. </div> <br /><em>The article &quot;Robust Preparation of Wigner-Negative States with Optimized SNAP-Displacement Sequences&quot; was published in the journal PRX Quantum and was written by Marina Kudra, Mikael Kervinen, Ingrid Strandberg, Shahnawaz Ahmed, Marco Scigliuzzo, Amr Osman, Daniel Pérez Lozano, Mats O. Tholén, Riccardo Borgani, David B. Haviland, Giulia Ferrini, Jonas Bylander, Anton Frisk Kockum, Fernando Quijandría, Per Delsing, and Simone Gasparinetti. </em><br /><div><br /></div> <div><a href=""><span><span style="display:inline-block"></span><span style="display:inline-block"></span></span><br /></a></div> <div><a href=""><br /></a></div> <div><strong>For more information, please contact: </strong><br /></div> <div><br /></div> <div>Marina Kudra, PhD-student at the Department of Microtechnology and Nanoscience, Division of Quantum Technology, Chalmers University of Technology, + 46 (0)790 398 486, <a href=""></a><br /></div> <div><br /></div> <div>Simone Gasparinetti, Assistant Professor at the Department of Microtechnology and Nanoscience, Division of Quantum Technology, Chalmers University of Technology. Principal Investigator of the Wallenberg Centre for Quantum Technology: +46 (0)31 772 65 73, <a href=""> </a><br /></div>Tue, 27 Sep 2022 11:00:00 +0200 sheds light on what happens in a trillionth of a second<p><b>​What really happens in a billionth of a billionth of a second? That is what professor Anne L'Huillier at Lund University has devoted her research career to shed light on, and for her discoveries she is now rewarded with the 2020 Lise Meitner Award.“It means a lot to me. Lise Meitner is a strong female role model, something that is very important when you are a woman and conduct your research within a subject dominated by men,&quot; she says.</b></p><div>​An attosecond is a trillionth of a second, and it is around laser pulses on that time scale that Professor Anne L'Huillier's research revolves. She has been at the forefront of research into ultrafast lasers for more than 30 years, and it is for those achievements and for paving the way for that research that she is now being awarded the Lise Meitner Award.</div> <div> </div> <div>&quot;It feels great that my research is being recognised in my new home country Sweden,&quot; she says.</div> <div> </div> <div>Born in France, Anne L'Huillier has links to Sweden that go way back. In the mid-80s, she did a postdoc at Chalmers, and worked with professor Göran Wendin.</div> <div> </div> <div>&quot;It was a very rewarding period for me, and it has come to play a big role in my career,&quot; she says.</div> <div> </div> <div><h2 class="chalmersElement-H2">Laid the foundation for attosecond research</h2></div> <h2 class="chalmersElement-H2"> </h2> <div>After some time back in France, she ended up at Lund University in the mid-90s, and for many years she has led a research group in atomic physics that studies the motion of electrons with the help of attosecond pulses. Her research group has helped lay the foundation for attosecond research, and enabled physicists and chemists to visualize the movement patterns of valence electrons. </div> <div> </div> <div><br /></div> <div>In later years, she has also become one of several research leaders in the quantum computer project WACQT, organized by Chalmers University of Technology, where she once again has worked with Göran Wendin.</div> <div> </div> <div>The lecture that Anne L'Huillier will give at the award ceremony is called &quot;What happens in a billionth of a billionth of a second?&quot; and concerns the ultra-short light pulses that her research group uses to study rapid processes and the movement of electrons in matter.</div> <div> </div> <div>&quot;What drives me as a researcher is learning,&quot; she says. “To still be able to learn new things all the time is very exciting. And to then be able to teach what I've learned is also very rewarding. In addition, it is very exciting when my research comes into use for science and for our society.”</div> <div><br /></div> <div>Text: Robert Karlsson</div> <div><br /></div> <div><a href="/en/centres/gpc/activities/lisemeitner/Pages/default.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about the Lise Meitner award</a><br /></div>Tue, 06 Sep 2022 00:00:00 +0200ël-Van-Laer-appointed-future-research-leaders.aspx Frisk Kockum and Raphaël Van Laer appointed Research Leaders of the Future<p><b>​When the Foundation for Strategic Research appointed the Research Leaders of the Future, two of the 16 selected researchers were from MC2. Anton Frisk-Kockum and Raphaël Van Laer both receives a grant of 15 million SEK each over a five-year period and will during the program participate in a solid leadership training.</b></p><div>​“I’m both humbled by the trust in me and my research ideas that SSF shows by awarding this grant, and excited to start the project”, says Anton Frisk Kockum, who receives the grant for the project “Quantum simulation and communication with giant atoms”.</div> <div><br /></div> <div>The project aims to harness a new regime of light-matter interaction, so-called giant atoms, for useful applications. In these systems, interference effects make it possible to turn on and off the coupling between a system emulating the properties of an atom and a surrounding environment.</div> <h2 class="chalmersElement-H2">Two purposes</h2> <div>&quot;I will use this setup for two purposes: first to efficiently simulate quantum systems of interest (e.g., molecules) that interact with their surroundings, and second to enable communication between quantum systems, e.g., two quantum-computing processors&quot;, says Anton Frisk Kockum. </div> <div><br /></div> <div>&quot;This funding will let me create a research group devoted to giant atoms and their applications. I currently have one PhD student working on these topics. I will now recruit one postdoc and one more PhD student. The funding also comes with an excellent leadership training program, which I look forward to participating in and learning from.&quot;</div> <div><h2 class="chalmersElement-H2">Overlooked potential in acoustic and optical devices<br /></h2></div> <div>Raphaël Van Laer receives the grant for his project “Attojoule-per-bit acousto-optics”.<br /><br />&quot;Society relies heavily on transistor-based information technologies such as computers and the internet. These systems became increasingly powerful in what is known as Moore’s law. Today, this trend is faltering as transistors are reaching performance limits. The project’s goal is to lay the foundations for new types of information technology with chip-scale light and sound&quot;, he says.<br /><br />He aims to greatly reduce the energy footprint of emerging coherent information processors based on photonics and quantum technology.<br /></div> <div><h2 class="chalmersElement-H2">High hopes and aspirations<br /></h2> <div>&quot;The broad potential of acousto-optic interactions has mostly been overlooked. In this project, we will develop near-term use-cases of acoustic and optical devices and especially in quantum technology. This will synergize well with the more fundamental quantum engineering we do&quot;, he says. He adds that it feels very exciting and humbling to receive the grant, and that it is a great opportunity that comes with great responsibility.</div> <div> </div> <div>&quot;We are a small team in quantum photonics with a new laboratory supported mainly by the EU and WACQT. The new SSF grant will make a big impact on our ability to pursue risky ideas and build critical mass. Our hopes and aspirations are high. The grant gives us a mandate to be brave and to keep going especially when things become difficult. We need to adapt and learn quickly from trial-and-error. I am also eager to join SSF's leadership program. Finally, I believe that the project will be well-suited for near-term interaction with related work at MC2. I look forward to exploring this with colleagues in photonics and quantum engineering&quot;, he says.</div></div> <div><br /></div> <h2 class="chalmersElement-H2">Contact</h2> <div><a href="/en/staff/Pages/Anton-Frisk-Kockum.aspx">Anton Frisk Kockum</a>, Researcher, <a href=""></a>, +46317723190<br /></div> <div><span><a href="/en/staff/Pages/raphael-van-laer.aspx">Raphaël Van Laer</a>, <span></span></span>Assistant Professor, <a href=""></a>, +46317724030<br /></div> <div><br /></div> <div>Text: Robert Karlsson</div> <div><br /></div> <h2 class="chalmersElement-H2">Read more</h2> <div><a href="/en/news/Pages/They-are-the-future-research-leaders.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />They are the Future Research Leaders</a>,</div> <div><a href=""><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />SSF press release</a>,<br /></div>Mon, 27 Jun 2022 11:00:00 +0200 for ICT seed projects 2023<p><b> Call for proposals within ICT strategic areas and involving interdisciplinary approaches.​</b></p><h3 class="chalmersElement-H3" style="color:rgb(153, 51, 0)"><br /></h3> <h3 class="chalmersElement-H3">Important dates:</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><ul><li><b>NEW! Submission date: </b><span>9 May, at 09.00</span>, 2022</li> <li><b>Notification:</b> mid-June, 2022</li> <li><b>Expected start of the project:</b> January 2023</li></ul></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">Background</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><b>The Information and Communication Technology (ICT) Area of Advance</b> (AoA) provides financial support for SEED projects, i.e., projects involving innovative ideas that can be a starting point for further collaborative research and joint funding applications. </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>We will prioritize research projects that <strong>involve researchers from different research communities</strong> (for example across ICT departments or between ICT and other Areas of Advances) and who have not worked together before (i.e., have no joint projects/publications). </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>Research projects involving a <strong>gender-balanced team and younger researchers</strong>, e.g., assistant professors, will be prioritized. Additionally, proposals related to <strong>sustainability</strong> and the UN Sustainable Development Goals are encouraged.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><b><em>Note: </em></b><em>Only researchers employed at Chalmers can apply and can be funded. PhD students cannot be supported by this call.  Applicants and co-applicants of research proposals funded in the 2021 and 2022 ICT SEED calls cannot apply. </em></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><em><br /></em></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><b>The total budget of the call is 1 MSEK.</b> We expect to fund 3-5 projects</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">Details of the call</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><ul><li>The project should include at least two researchers from different divisions at Chalmers (preferably two different departments) who should have complementary expertise, and no joint projects/publications.</li> <li>Proposals involving teams with good gender balance and involving assistant professors will be prioritized.</li> <li>The project should contribute to sustainable development. </li> <li>The budget must be between 100 kSEK and 300 kSEK, including indirect costs (OH). The budget is mainly to cover personnel costs for Chalmers employees (but not PhD students). The budget cannot cover costs for equipment or travel costs to conferences/research visits. </li> <li>The project must start in early 2023 and should last 3-6 months. </li></ul></div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">What must the application contain?</h3> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>The application should be at most 3 pages long, font Times–Roman, size 11. In addition, max 1 page can be used for references. Finally, an additional one-page CV of each one of the applicants must be included (max 4 CVs). Proposals that do not comply with this format will be desk rejected (no review process).</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>The proposal should include:</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>a)<span style="white-space:pre"> </span>project title </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>b)<span style="white-space:pre"> </span>name, e-mail, and affiliation (department, division) of the applicants</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>c)<span style="white-space:pre"> </span>the research challenges addressed and the objective of the project; interdisciplinary aspects should be highlighted; also the applicant should discuss how the project contributes to sustainable development, preferably in relation to the <a href="" title="link to UN webpage">UN Sustainable Development Goals (SDG)</a>. Try to be specific and list the targets within each Goal that are addressed by your project.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>d)<span style="white-space:pre"> </span>the project description </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>e)<span style="white-space:pre"> </span>the expected outcome (including dissemination plan) and the plan for further research and funding acquisition</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>f)<span style="white-space:pre"> </span>the project participants and the planned efforts</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>g)<span style="white-space:pre"> </span>the project budget and activity timeline
</div> <div><div><br /></div> <h3 class="chalmersElement-H3">Evaluation criteria</h3> <div><ul><li>Team composition</li> <li>Interdisciplinarity</li> <li>Novelty</li> <li>Relevance to AoA ICT and Chalmers research strategy as well as to SDG</li> <li>Dissemination plan</li> <li>Potential for further research and joint funding applications</li> <li>Budget and project feasibility​</li></ul></div></div> <div><span style="color:rgb(33, 33, 33);font-family:inherit;font-size:16px;font-weight:600;background-color:initial"><br /></span></div> <div><span style="color:rgb(33, 33, 33);font-family:inherit;font-size:16px;font-weight:600;background-color:initial">Submission</span></div> <div> </div> <div> </div> <div> </div> <div>The application should be submitted as <b>one PDF document</b>.<span style="background-color:initial"></span></div> <div><br /></div> <div><a href="" target="_blank" title="link to submission"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Submit​</a></div> <div><br /></div> <div> </div> <div> </div> <div> </div> <p class="chalmersElement-P"><span><br /></span></p> <div> </div> <p class="chalmersElement-P"> </p> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><span style="background-color:initial">The proposals will be evaluated by the AoA ICT management group and selected Chalmers researchers.

</span></div> <div><span style="background-color:initial"><b><br /></b></span></div> <div><span style="background-color:initial"><b>Questions</b> can be addressed to <a href="">Erik Ström</a></span></div> <div> </div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial">General information about the ICT Area of Advance can be found at <a href="/en/areas-of-advance/ict/Pages/default.aspx"> ​</a></span><br /></div> <div> </div> <div><span style="background-color:initial"><br /></span></div> <div> </div> <div><img src="/SiteCollectionImages/Areas%20of%20Advance/Information%20and%20Communication%20Technology/About%20us/IKT_logo_600px.jpg" alt="" /><span style="background-color:initial">​​<br /></span></div>Wed, 30 Mar 2022 00:00:00 +0200 L’Huillier wins Wolf Prize in Physics<p><b>​WACQT principal investigator Anne L’Huillier is one of this year's recipients of the Wolf Prize – the most prestigious award in physics next to the Nobel Prize. She wins the prize for her pioneering work in ultrafast laser science and attosecond physics.</b></p><br /><b style="background-color:initial"><span lang="EN-GB"></span></b><p class="MsoNormal"><span lang="EN-GB"><br /><img src="/SiteCollectionImages/Centrum/WACQT/LHuillier-Wolf-Prize-2022.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:250px;height:250px" />”It feels incredible – I’m really amazed. The prize is a recognition of almost everything I have done during my career as a researcher,” says Anne L’Huillier, professor in atomic physics at Lund University.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">She shares the 2022 Wolf Prize in Physics with professors Paul Corkum at the University of Ottawa, Canada, and Ferenc Krausz at the Max Planck Institute for Quantum Optics in Germany.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">“I have collaborated with many researchers, but very little with Corkum and Krausz. Having entered the field from different directions, we have mostly done complementary work. My entrance, and somewhat my privilege, is that I have been involved from the very beginning,” she says.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">It all started in 1988, when Anne L’Huillier and her colleagues in Paris discovered high-order harmonics of light being generated in a gas exposed to an intense laser field.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">“It was a bit of a coincidence. Our intention was to study fluorescence in the gas, but instead we saw these high-order harmonics. I found it very fascinating and really got stuck in exploring this new phenomenon which is an interesting combination of atomic physics, more precisely the response of an atom to a strong laser field and non-linear optics.”</span></p> <p class="MsoNormal"><span style="background-color:initial">A powerful titanium sapphire laser – the first of its kind in Europe – brought Anne L’Huillier to Lund in 1992 to do experiments. Two years later, she moved to Lund permanently to share her life with one of the researchers behind the Lund high-power laser facility.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">Early on, it was theoretically predicted that if the high-order harmonics can be synchronized with each other, it would result in a series of extremely short light pulses, with durations of a few tens or hundreds of attoseconds. It took the field 14 years, until 2001, to show it experimentally.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">The time scale is unfathomably short; an attosecond is no more than a billionth of a billionth of a second. Using light pulses this short as “camera flashes” enables the detection of the incredibly rapid motion of electrons.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">“The second part of my research has been to use these pulses to study the ultrafast dynamics of atoms and molecules, especially photoionization,” tells L’Huillier.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">In their experiments with the short pulses, her team constantly creates entangled quantum states – entangled electron pairs, entangled ion and electron, and entangled degrees of freedom. During the last couple of years, L’Huillier – and part of the research field – have become increasingly interested in characterising these entangled quantum states, and understanding their decoherence mechanism (the concepts of entangled states and decoherence are explained in the <a href="/en/centres/wacqt/discover/Pages/default.aspx"><span>WACQT website</span></a>).</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">In 2021, L’Huillier became one of the principal investigators in the WACQT management, where she is one of the coordinators of research in quantum sensing. She also leads a WACQT project on characterizing and controlling atomic matter on attosecond timescales.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">“Anne L’Huillier’s group brings important expertise to WACQT regarding time-resolved spectroscopy and control of the dynamics of quantum systems,” says Göran Wendin, senior advisor in WACQT and also theoretical supervisor of L’Huillier when she was a PhD student in Paris and during her postdoc at Chalmers in 1986.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">“Being a part of WACQT is really exciting. I learn new things and follow the development of the quantum information field. We want to apply many of the concepts from this field to the entangled electrons that we create with our attosecond pulses,” says Anne L’Huillier.</span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">The work done within WACQT is one of her main priorities at the moment. Another priority is to work with industrial applications in order to contribute to the utilisation of attosecond light pulses. The fact that these pulses are coherent and broadband is of interest, for example, for the semi-conductor industry. </span><span style="background-color:initial"> </span></p> <p class="MsoNormal"><span lang="EN-GB">“I see a very nice future for ultrashort laser pulses, with many applications in different directions. After 30 years with titanium sapphire lasers, there is now a shift to ytterbium-based laser systems which are much smaller and easier to handle. This should open the field also to people who are not laser specialists, but rather specialists within one of the many possible applications,” L’Huillier predicts.</span></p> <p class="MsoNormal"><span lang="EN-GB"> </span></p> <p class="MsoNormal"><b><span lang="EN-GB">About the Wolf Prize</span></b></p> <p class="MsoNormal"><span lang="EN-GB">The Wolf Prize is awarded annually by the Israeli Wolf Foundation to outstanding scientists and artists from around the world for “achievements promoting science and art in the interest of mankind and friendly relations among peoples, regardless of race, religion, gender, geographical location or political opinion.”</span></p> <p class="MsoNormal"><span lang="EN-GB"> </span></p> <p class="MsoNormal"><b><span lang="EN-GB">Read more</span></b></p> <p class="MsoNormal"><span lang="EN-GB"><a href=""><span>The Wolf Prize</span></a><br /></span><a href=""><span>Anne L’H</span><span style="background-color:initial">uillier’s research group</span>​</a></p> <p class="MsoNormal"><span lang="EN-GB"> </span></p> <p class="MsoNormal"><span lang="EN-GB">Te</span><span style="background-color:initial">xt: Ingela Roos</span></p> Mon, 07 Mar 2022 09:00:00 +0100​Time to inaugurate all-wise computer resource<p><b>​Alvis is an old Nordic name meaning &quot;all-wise&quot;. An appropriate name, one might think, for a computer resource dedicated to research in artificial intelligence and machine learning. The first phase of Alvis has been used at Chalmers and by Swedish researchers for a year and a half, but now the computer system is fully developed and ready to solve more and larger research tasks.​</b></p><br /><div><img src="/SiteCollectionImages/Areas%20of%20Advance/Information%20and%20Communication%20Technology/300x454_Alvis_infrastructure_1.png" alt="A computer rack" class="chalmersPosition-FloatRight" style="margin:10px;width:270px;height:406px" />Alvis is a national computer resource within the <strong><a href="">Swedish National Infrastructure for Computing, SN​IC,</a></strong> and started on a small scale in the autumn of 2020, when the first version began being used by Swedish researchers. Since then, a lot has happened behind the scenes, both in terms of use and expansion, and now it's time for Chalmers to give Swedish research in AI and machine learning access to the full-scale expanded resource. The digital inauguration will take place on <span style="font-weight:normal"><a href="/en/areas-of-advance/ict/calendar/Pages/Alvis-inauguration-phase-2.aspx">February 25, 202</a>2.</span></div> <div><br /></div> <div><b>What can Alvis contribute to, then? </b>The purpose is twofold. On the one hand, one addresses the target group who research and develop methods in machine learning, and on the other hand, the target group who use machine learning to solve research problems in basically any field. Anyone who needs to improve their mathematical calculations and models can take advantage of Alvis' services through SNIC's application system – regardless of the research field.</div> <div><span style="background-color:initial">&quot;Simply put, Alvis works with pattern recognition, according to the same principle that your mobile uses to recognize your face. What you do, is present very large amounts of data to Alvis and let the system work. The task for the machines is to react to patterns - long before a human eye can do so,&quot; says <b>Mikael Öhman</b>, system manager at Chalmers e-commons.</span><br /></div> <div><br /></div> <h3 class="chalmersElement-H3">How can Alvis help Swedish research?</h3> <div><b>Thomas Svedberg</b> is project manager for the construction of Alvis:</div> <div>&quot;I would say that there are two parts to that answer. We have researchers who are already doing machine learning, and they get a powerful resource that helps them analyse large complex problems.</div> <div>But we also have those who are curious about machine learning and who want to know more about how they can work with it within their field. It is perhaps for them that we can make the biggest difference when we now can offer quick access to a system that allows them to learn more and build up their knowledge.&quot;</div> <div><br /></div> <div>The official inauguration of Alvis takes place on February 25. It will be done digitally, and you will find all <a href="/en/areas-of-advance/ict/calendar/Pages/Alvis-inauguration-phase-2.aspx">information about the event here.</a></div> <div><br /></div> <h3 class="chalmersElement-H3">Facts</h3> <div>Alvis, which is part of the national e-infrastructure SNIC, is located at Chalmers. <a href="/en/researchinfrastructure/e-commons/Pages/default.aspx">Chalmers e-commons</a> manages the resource, and applications to use Alvis are handled by the <a href="">Swedish National Allocations Committee, SNAC</a>. Alvis is financed by the <b><a href="">Knut and Alice Wallenberg Foundation</a></b> with SEK 70 million, and the operation is financed by SNIC. The computer system is supplied by <a href="" target="_blank">Lenovo​</a>. Within Chalmers e-commons, there is also a group of research engineers with a focus on AI, machine learning and data management. Among other things, they have the task of providing support to Chalmers’ researchers in the use of Alvis.</div> <div> </div> <h3 class="chalmersElement-H3">Voices about Alvis:</h3> <div><b>Lars Nordström</b>, director of SNIC: &quot;Alvis will be a key resource for Swedish AI-based research and is a valuable complement to SNIC's other resources.&quot;</div> <div><br /></div> <div><span style="background-color:initial"><strong>Sa</strong></span><span style="background-color:initial"><strong>ra Mazur</strong>, Director of Strategic Research, Knut and Alice Wallenberg Foundation: &quot;</span>A high-performing national computation and storage resource for AI and machine learning is a prerequisite for researchers at Swedish universities to be able to be successful in international competition in the field. It is an area that is developing extremely quickly and which will have a major impact on societal development, therefore it is important that Sweden both has the required infrastructure and researchers who can develop this field of research. It also enables a transfer of knowledge to Swedish industry.&quot;<br /></div> <div><br /></div> <div><b>Philipp Schlatter</b>, Professor, Chairman of SNIC's allocation committee Swedish National Allocations Committee, SNAC: &quot;Calculation time for Alvis phase 2 is now available for all Swedish researchers, also for the large projects that we distribute via SNAC. We were all hesitant when GPU-accelerated systems were introduced a couple of years ago, but we as researchers have learned to relate to this development, not least through special libraries for machine learning, such as Tensorflow, which runs super fast on such systems. Therefore, we are especially happy to now have Alvis in SNIC's computer landscape so that we can also cover this increasing need for GPU-based computer time.&quot;</div> <div><br /></div> <div><strong>Scott Tease</strong>, Vice President and General Manager of Lenovo’s High Performance Computing (HPC) and Artificial Intelligence (AI) business: <span style="background-color:initial">“Lenovo </span><span style="background-color:initial">is grateful to be selected by Chalmers University of Technology for the Alvis project.  Alvis will power cutting-edge research across diverse areas from Material Science to Energy, from Health care to Nano and beyond. </span><span style="background-color:initial">Alvis is truly unique, built on the premise of different architectures for different workloads.</span></div> <div>Alvis leverages Lenovo’s NeptuneTM liquid cooling technologies to deliver unparalleled compute efficiency.  Chalmers has chosen to implement multiple, different Lenovo ThinkSystem servers to deliver the right NVIDIA GPU to their users, but in a way that prioritizes energy savings and workload balance, instead of just throwing more underutilized GPUs into the mix. Using our ThinkSystem SD650-N V2 to deliver the power of NVIDIA A100 Tensor Core GPUs with highly efficient direct water cooling, and our ThinkSystem SR670 V2 for NVIDIA A40 and T4 GPUs, combined with a high-speed storage infrastructure,  Chalmers users have over 260,000 processing cores and over 800 TFLOPS of compute power to drive a faster time to answer in their research.”</div> <div><br /></div> <div><br /></div> <div><a href="/en/areas-of-advance/ict/calendar/Pages/Alvis-inauguration-phase-2.aspx" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" /></a><a href="/en/areas-of-advance/ict/calendar/Pages/Alvis-inauguration-phase-2.aspx">SEE INAUGURATION PROGRAMME​</a></div> <div><br /></div> <div><em>Text: Jenny Palm</em></div> <em> </em><div><em>Photo: Henrik Sandsjö</em></div> <div><em>​<br /></em></div> <div><em><img src="/SiteCollectionImages/Areas%20of%20Advance/Information%20and%20Communication%20Technology/750x422_Alvis_infrastructure_3_220210.png" alt="Overview computor" style="margin:5px;width:690px;height:386px" /><br /><br /><br /></em></div> <div><br /></div> <div><br /></div> ​Sun, 13 Feb 2022 00:00:00 +0100 technique to measure electric forces acting on a trapped ion<p><b>​Trapping ions by using carefully controlled electrical fields is a method used in precision spectroscopy, atom clocks and prototype quantum computers. However, this platform is sensitive to stray electric fields that reduce performance. Now, researchers at Chalmers University of Technology and Stockholm University have developed a new technology that can measure the unwanted fields with greater accuracy and precision, and thus compensate for them.</b></p><div>​One second in 30 billion years. That is the error margin in the most precise atomic clock that humankind has produced today. Atomic clocks rely on stable atomic transitions as frequency references, but this method doesn’t come without problems. Trapped-ion atomic clocks are sensitive to stray electric fields which cause the ion to move and experience Doppler shifts, and this decreases the clock’s precision and accuracy.</div> <div><br /></div> <div>It is this problem that Gerard Higgins, researcher at Chalmers University of Technology, has found a new solution to. He demonstrated the technique with Markus Hennrich’s Trapped Ion Quantum Technology group at Stockholm University.</div> <div><br /></div> <div>“I came up with a technique to more precisely measure unwanted electric forces acting on a trapped ion, and I demonstrated it experimentally”, he says. “My technique allows the forces to be measured more quickly and more precisely than the existing techniques.”</div> <div><h2 class="chalmersElement-H2">Drives the development of quantum physics</h2></div> <div><img src="/sv/institutioner/mc2/nyheter/PublishingImages/Gerard%20Higgins.jpeg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:230px;height:391px" />Atomic clocks go hand in hand with precision spectroscopy. In precision spectroscopy, the energy levels of atoms and molecules are probed, and used to reveal properties of atoms and molecules, and their constituent electrons, protons and neutrons. Spectroscopy has driven the development of quantum physics – as measurements have become more precise, unexpected results have been found and quantum theory has had to be refined. Likewise, spectroscopy has allowed new theories to be tested, and continues to be used to search for new physics; researchers are using ever more precise spectroscopy to test whether the fundamental constants are really constant, and to test the similarities and differences between normal matter and anti-matter. </div> <div><br /></div> <div>“Ever more precise spectroscopy requires ever more careful control of unwanted effects which can bias the results, such as unwanted electric fields in an ion trap”, says Gerard Higgins.</div> <div><br /></div> <div>The new technique will make atomic clocks more accurate, as they involve spectroscopy. They use the difference between two atomic energy levels as a frequency reference, and so more precise spectroscopy means more precise atomic clocks.</div> <div><br /></div> <div>Unwanted electric fields can also limit the fidelity of a trapped ion quantum information processor, the sensitivity of a trapped ion force sensor, and pose limits to fundamental studies of trapped ion-neutral atom interactions. With the new technique, unwanted electric fields can be probed and compensated, so that they don’t pose a problem.</div> <div><br /></div> <div> “To my knowledge, the technique is faster than the existing techniques – this means one doesn’t need to spend much time interrupting the main experiment to be able to diminish unwanted fields, and the technique is more precise than the existing techniques. What’s more it’s quite easy to implement and automate”, says Gerard Higgins.</div> <div><br /></div> <h2 class="chalmersElement-H2">About the new technique</h2> <div>The new technique uses interferometry to precisely measure the ion displacement caused by the weak forces. Interferometers are used for the most sensitive displacement measurements, for instance most gravitational wave detectors are interferometers. Instead of a normal interferometer with two optical paths, though, the new technique relies on a technique called Ramsey interferometry. Ramsay interferometry is a standard technique used in experimental quantum physics, often used for quantifying a qubit’s coherence time. During Ramsey interferometry, the trapped ion qubit is excited to a superposition of two electronic states, and two laser pulses act as an interferometer’s beam splitters. The ion qubit is sensitive to the laser phase, so if the ion is displaced between application of the laser pulses, a measurement of the qubit reveals the displacement</div> <div><h2 class="chalmersElement-H2">Read the full scientific article in New Journal of Physics</h2></div> <div><a href="" target="_blank">&quot;Micromotion minimization using Ramsey interferometry&quot;</a><br /></div> <div><h2 class="chalmersElement-H2">Contact information</h2></div> <div>Gerard Higgins<br />Postdoc at the Department of Microtechnology and Nanoscience, Quantum Technology Laboratory<br /></div> <div><a href=""></a><br /></div> <div><br /></div> <div>Text: Robert Karlsson<br />Photos: Markus Hennrich and Cristine Calil Kores <br />Illustration: Gerard Higgins, Marion Mallweger and Robin Thomm<br /></div>Wed, 09 Feb 2022 10:10:00 +0100 multi-qubit gates enhance the performance of quantum computers<p><b>​Available quantum computers struggle with noise that causes the qubits to quickly forget their values. Therefore, it is desirable to execute the algorithms swiftly. A team of WACQT researchers have now shown how two-qubit gates can be run simultaneously to create multi-qubit gates, which are more powerful – but still take less time to execute – than the constituent two-qubit gates. ​​</b></p>​<span style="background-color:initial">Quantum algorithms may outperform classical ones on important computational tasks in chemistry, optimization, and many other fields. However, to run on current quantum computers, these algorithms must be compiled into long sequences of elementary operations (gates) on one or two qubits. </span><div><br /></div> <div>Since the available quantum hardware still struggles to protect qubits from noise, it is desirable to execute the algorithms as swiftly as possible. In a recent publication, a team of WACQT researchers at Chalmers shows how two-qubit gates on existing quantum hardware can be run simultaneously to create new, powerful multi-qubit gates, which surprisingly take less time to execute than the two-qubit gates from which they are constructed.</div> <div><br /></div> <div>“This is not entirely intuitive, but it arises from interference between the simultaneous two-qubit gates,” says Anton Frisk Kockum who led the study.</div> <div><br /></div> <div>The team has specifically explored how to create three-qubit gates. The key in their scheme is two-qubit gates that swap excitations between two neighbouring qubits. When the middle qubit in a chain of three qubits simultaneously interacts in that manner with both its neighbours, a pathway is created for swapping states between the two outer qubits, conditioned on the state of the middle qubit. And thus a three-qubit gate is created.</div> <div><br /></div> <div>Through extensive numerical simulations, the team has shown that such three-qubit gates can be constructed for multiple quantum computer architectures and that they can be implemented with high reliability in available experimental setups. The results also suggest that additional multi-qubit gates can be discovered using similar constructions with other two-qubit gates. </div> <div><br /></div> <div>“This new way of creating multi-qubit gates opens up for re-compiling many quantum algorithms into shorter gate sequences, enhancing the performance of existing quantum computers without needing to upgrade the hardware,” says Frisk Kockum.</div> <div><br /></div> <div>Read more in the paper <a href="" target="_blank">Fast Multiqubit Gates through Simultaneous Two-Qubit Gates​​​​</a>, published in PRX Quantum.</div> <div><br /></div> <div>Text: Ingela Roos</div>Thu, 16 Dec 2021 10:00:00 +0100 research on how to reduce the interference in superconducting components<p><b>​In a newly published article in Science Advances, Chalmers researchers present experiments and models that explain how to reduce the interference from defects in materials for superconducting electronic components. The interference is reduced by exposing the materials to a radio frequency electric field.The new results may in particular play an important role in the production of quantum computers.</b></p>​<span style="background-color:initial">Superconducting materials contain defects that generate disturbing noise. Today, no one knows for sure exactly what these defects consist of.</span><div><br /></div> <div>&quot;They are atoms or molecules with electric charge that exist in dielectric * materials, on the surface of metals and insulating materials. There is always a thin oxide that forms on the surface, and the oxide is not completely perfect but has defects in it&quot;, says Jonas Bylander, associate professor at the  Quantum Technology Laboratory at the Department of Microtechnology and Nanoscience.</div> <div><br /></div> <div>In the newly published research, Jonas Bylander and his colleagues show how it is possible to reduce the noise in the materials by exposing them to a radio-frequency electric field.</div> <div><br /></div> <div>&quot;We discovered that it is the same kind of defects that dominate how well different materials and components work&quot;, says Jonas Bylander. &quot;And we developed a model that explains in detail what is happening.&quot;</div> <div><br /></div> <div>The researchers discovered that the defects display so-called &quot;motional narrowing&quot; when they are exposed to the radio-frequency electric field, something that has not been previously detected in dielectric materials. Jonas Bylander compares the effect that occurs with that of reduced motion blur in a photograph.</div> <div><br /></div> <div>&quot;One can say that these existing defects can have several different positions, and when the background fluctuates, the defects can jump between these positions. But when we make the background fluctuate faster, the defects do not catch up. The result is that the defects appear to be sitting still. Unintuitively, it’s almost the opposite of motion blur.&quot;</div> <div><br /></div> <div>The newly published research increases the understanding of how materials used to build superconducting circuits work – when reducing the noise, the components perform better.</div> <div><br /></div> <div>&quot;We try to build better components from better materials and design the components so that they are not so sensitive to noise, and if we understand the materials better, we will also be able to build better quantum computers.&quot;</div> <div><br /></div> <div>Text: Robert Karlsson<br /></div> <h3 class="chalmersElement-H3">Read the scientific article here</h3> <div><a href="" target="_blank"></a></div> <div>---</div> <div>* A dielectric material is an electrical insulator that can be polarized by an applied electric field.</div>Thu, 21 Oct 2021 15:30:00 +0200 computer project boosted by superstar<p><b>​John Martinis, superstar in quantum computing and former leader of Google's venture in the field, has spent the last month at Chalmers as a guest researcher.“The quantum computing team at Chalmers is doing all the right things and is in a position to make good progress,” he says.</b></p>​<span style="background-color:initial">In 2019, a research team at Google made a big breakthrough: their quantum computer managed to surpass the world's best supercomputers in solving a computational task (read more in <a href="/en/departments/mc2/news/Pages/Big-breakthrough-for-quantum-computers.aspx" target="_blank">Big breakthrough for quantum computers​</a>).</span><div><br /></div> <div>The chief scientist behind Google's quantum computer, world-famous Professor John Martinis, left Google the following year and returned to his university, University of California, Santa Barbara. However, he spent last month in Gothenburg as a guest researcher in Chalmers’ quantum computing team where Per Delsing and Jonas Bylander lead the engineering of a Swedish quantum computer. The focus has mainly been on the basic building blocks of the quantum computer – the qubits.</div> <h2 class="chalmersElement-H2">Broke new ground</h2> <div><span style="background-color:initial">Although Martinis and his former colleagues at Google broke new ground with their 53-qubit quantum computer, he admits that it did not work quite as well as they wanted. But it was difficult to find out why in the complex system that made up the quantum computer.</span><br /></div> <div><br /></div> <div><img src="/sv/institutioner/mc2/nyheter/PublishingImages/John2_400x400px.jpg" alt="John Martinis" class="chalmersPosition-FloatRight" style="margin:5px;width:200px;height:200px" />“Today people tend to focus on how many qubits you have. In my opinion, one needs to go back and improve the qubits before scaling up. I’ve been thinking quite deeply on how to make superconducting qubits better, and I wanted to come here because the Chalmers team is doing great work on this,” says John Martinis.</div> <div><br /></div> <div>He does not have his own research group at the moment, but still many ideas about experiments that could be done to better understand the factors that affect the performance of the qubits.</div> <div><br /></div> <div>“Many of the experiments I wanted to do last year, they already did here. From their data I’ve been able to better understand what’s going on with the materials in the qubits. And I have shared my ideas on how to analyze the data and about further experiments to do.”</div> <h2 class="chalmersElement-H2">&quot;Many valuable suggestions&quot;</h2> <div><span style="background-color:initial">Per Delsing describes John Martinis' visit as a shot in the arm:</span></div> <div>“The entire group looks up to him, like a hero. The fact that we all got to spend time with him and his deep interest in what everyone is doing has been like a huge shot. John is extremely skilled and experienced and has given us many valuable suggestions on how to continue our work.”</div> <div>The plan now is to stay in touch, to share results, thoughts and ideas.</div> <div><span style="background-color:initial">“I think that really good things will come out of this,” says John Martinis.</span><br /></div> <div><br /></div> <div><div>Text: Ingela Roos</div> <div>Photo: Kamanasish Debnath</div></div> <div><h2 class="chalmersElement-H2">More about Chalmer’s quantum computer project</h2> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-attachment:initial;background-origin:initial;background-clip:initial">The research is part of the Wallenberg Centre for Quantum Technology (WACQT), a twelve-year, billion-SEK investment with two main purposes: to develop Swedish expertise in quantum technology, and to build a useful quantum computer with at least one hundred quantum bits. The research centre is mainly funded by the Knut and Alice Wallenberg Foundation.</span></p> <h2 class="chalmersElement-H2"><span lang="EN-GB">Read more:</span></h2> <p class="MsoNormal" style="margin-bottom:7.5pt;line-height:16.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-attachment:initial;background-origin:initial;background-clip:initial"><span lang="EN-GB"><a href="/en/news/Pages/Engineering-of-a-Swedish-quantum-computer-set-to-start.aspx"><b>Engineering of a Swedish quantum computer set to start</b></a></span><span lang="EN-GB" style="font-size:10.5pt"> (initial press release from 2017)<br /> </span><span lang="EN-GB"><a href="/en/centres/wacqt/discover/Pages/default.aspx"><b>Discover quantum technology</b></a></span><span lang="EN-GB" style="font-size:10.5pt"> (introduction to quantum technology)<br /> </span><span lang="EN-GB"><a href="/en/centres/wacqt/discover/Pages/Quantum-computing.aspx"><b>Quantum computing</b></a></span><span lang="EN-GB" style="font-size:10.5pt"> (introduction to quantum computing)<br /> </span><span lang="EN-GB"><a href="/en/centres/wacqt/Pages/default.aspx"><b>Wallenberg Centre for Quantum Technology (WACQT)</b></a></span><span lang="EN-GB" style="font-size:10.5pt"><br /> </span><span lang="EN-GB"><a href="/en/centres/wacqt/research/Pages/Research-in-quantum-computing-and-simulation.aspx"><b>Research in quantum computing and simulation</b></a></span><span lang="EN-GB" style="font-size:10.5pt"> (about quantum computing research within WACQT) ​</span></p></div> Tue, 07 Sep 2021 16:30:00 +0200 light emitters developed for quantum circuits<p><b>​The promise of a quantum internet depends on the complexities of harnessing light to transmit quantum information over fiber optic networks. A potential step forward was reported today by WACQT researchers working at KTH who developed integrated chips that can generate light particles on demand and without the need for extreme refrigeration.</b></p><p class="chalmersElement-P">​<img src="/SiteCollectionImages/Centrum/WACQT/Ali%20Elshaari%20kth.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:120px;height:120px" /><span>The new method enables photon emitters to be precisely positioned in integrated optical circuits that resemble copper wires for electricity, except that they carry light instead, says Associate Professor </span>Ali Elshaari<span>.</span></p> <p class="chalmersElement-P"><span>Read more at </span><span style="background-color:initial"><a href=""></a></span></p>Tue, 11 May 2021 08:00:00 +0200 thermometer can accelerate quantum computer development <p><b>Researchers at Chalmers University of Technology, Gothenburg, Sweden, have developed a novel type of thermometer that can simply and quickly measure temperatures during quantum calculations with extremely high accuracy. The breakthrough provides a benchmarking tool for quantum computing of great value – and opens up for experiments in the exciting field of quantum thermodynamics.​​​</b></p><div><span style="background-color:initial">A key component in quantum computers are coaxial cables and waveguides – structures which guide waveforms, and act as the vital connection between the quantum processor, and the classical electronics which control it. Microwave pulses travel along the waveguides to the quantum processor, and are cooled down to extremely low temperatures along the way. The waveguide also attenuates and filters the pulses, enabling the extremely sensitive quantum computer to work with stable quantum states.  </span><br /></div> <div><br /></div> <div>In order to have maximum control over this mechanism, the researchers need to be sure that these waveguides are not carrying noise due to thermal motion of electrons on top of the pulses that they send. In other words, they have to measure the temperature of the electromagnetic fields at the cold end of the microwave waveguides, the point where the controlling pulses are delivered to the computer’s qubits. Working at the lowest possible temperature minimises the risk of introducing errors in the qubits.</div> <div><br /></div> <div>Until now, researchers have only been able to measure this temperature indirectly, with relatively large delay. Now, with the Chalmers researchers' novel thermometer, very low temperatures can be measured directly at the receiving end of the waveguide – very accurately and with extremely high time resolution.</div> <div><img src="/SiteCollectionImages/20210101-20210631/Simone%20Gasparinetti%20(1).jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px 10px;width:180px;height:157px" /><br />&quot;Our thermometer is a superconducting circuit, directly connected to the end of the waveguide being measured. It is relatively simple – and probably the world's fastest and most sensitive thermometer for this particular purpose at the millikelvin scale,&quot; says Simone Gasparinetti, Assistant Professor at the Quantum Technology Laboratory, Chalmers University of Technology.</div> <h2 class="chalmersElement-H2"><span style="font-family:inherit;background-color:initial"><br />Im</span><span style="font-family:inherit;background-color:initial">portant for measuring quantum computer performance</span><br /></h2> <div>The researchers at the Wallenberg Centre for Quantum Technology, WACQT, have the goal to build a quantum computer – based on superconducting circuits – with at least 100 well-functioning qubits, performing correct calculations by 2030. It requires a processor working temperature close to absolute zero, ideally down to 10 millikelvin. The new thermometer gives the researchers an important tool for measuring how good their systems are and what shortcomings exist – a necessary step to be able to refine the technology and achieve their goal.</div> <div><br /></div> <div><img src="/SiteCollectionImages/20210101-20210631/PerDelsing_171101_02%20(1).jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px 10px;width:180px;height:157px" />&quot;A certain temperature corresponds to a given number of thermal photons, and that number decreases exponentially with temperature. If we succeed in lowering the temperature at the end where the waveguide meets the qubit to 10 millikelvin, the risk of errors in our qubits is reduced drastically,&quot; says Per Delsing, Professor at the Department of Microtechnology and Nanoscience, Chalmers University of Technology, and leader of WACQT.</div> <div><br /></div> <div>Accurate temperature measurement is also necessary for suppliers who need to be able to guarantee the quality of their components, for example cables that are used to handle signals down to quantum states.</div> <h2 class="chalmersElement-H2">New opportunities in the field of quantum thermodynamics</h2> <div>Quantum mechanical phenomena such as superposition, entanglement and decoherence mean a revolution not only for future computing but potentially also in thermodynamics. It may well be that the thermodynamic laws somehow change when working down at the nanoscale, in a way that could one day be exploited to produce more powerful engines, faster-charging batteries, and more.</div> <div><br /></div> <div>&quot;For 15-20 years, people have studied how the laws of thermodynamics might be modified by quantum phenomena, but the search for a genuine quantum advantage in thermodynamics is still open,&quot; says Simone Gasparinetti, who recently started his own research group and plans to contribute to this search with a novel range of experiments.</div> <div><br /></div> <div>The new thermometer can, for example, measure the scattering of thermal microwaves from a circuit acting as a quantum heat engine or refrigerator.</div> <div><img src="/SiteCollectionImages/20210101-20210631/Marco%20Scigliuzzo%20(2).jpg" class="chalmersPosition-FloatLeft" alt="" style="margin:5px 10px;width:180px;height:157px" /><br />&quot;Standard thermometers were fundamental for developing classical thermodynamics. We hope that maybe, in the future, our thermometer will be regarded as pivotal for developing quantum thermodynamics,&quot; says Marco Scigliuzzo, doctoral student at the Department of Microtechnology and Nanoscience, Chalmers University of Technology.</div> <div><br /></div> <div><br /></div> <div><strong>Read more in the scientific article in Physical Review X:</strong></div> <div><a href="">Primary Thermometry of Propagating Microwaves in the Quantum Regime</a></div> <div><br /></div> <div><strong>More about: How the primary thermometer works</strong></div> <div><span style="background-color:initial">The </span><span style="background-color:initial">novel thermometer concept relies on the interplay between coherent and incoherent scattering from a quantum emitter driven at resonance. The emitter is strongly coupled to the end of the waveguide being tested. Thermal photons in the waveguide lead to a measurable drop in the coherently scattered signal, which is recorded continuously. In this way, the number of photons in the propagating mode of the microwave waveguides can be read – this corresponds to a temperature. The Chalmers researchers’ implementation, which uses a superconducting circuit operated at gigahertz frequencies, offers simplicity, large bandwidth, high sensitivity, and negligible power dissipation.<br /></span><span style="background-color:initial"><br /><b>More about: The Wallenberg Centre for Quantum Technology</b></span></div> <div><span style="background-color:initial"><div><a href="/en/centres/wacqt/Pages/default.aspx">The Wallenberg Centre for Quantum Technology​</a>, WACQT​, is a 12 year research center that aims to take Sweden to the forefront of quantum technology. The main project is to develop an advanced quantum computer. WACQT is coordinated from Chalmers University of Technology, and has activities also at the Royal Institute of Technology, Lund University, Stockholm University, Linköping University and Göteborg University. </div></span></div> Tue, 23 Mar 2021 07:00:00 +0100