Events: Mikroteknologi och nanovetenskap events at Chalmers University of TechnologyFri, 21 Sep 2018 10:02:07 +0200 coffee seminar: Coupled Surface Acoustic Waves Cavities<p>Kollektorn, lecture room,</p><p>​Talk by André Bilobran, University of Valencia</p> Physics Colloquium: How Nature makes Gold<p>PJ, lecture hall,</p><p>Colloquium by Karlheinz Langanke, Darmstadt University​, Germany</p><h4 class="chalmersElement-H4">​Abstract:</h4> <div><span style="background-color:initial">Where does Nature produce heavy elements like gold or platinum? To answer this question requires interdisciplinary research in astronomical </span><span style="background-color:initial">observation, astrophysical modelling and nuclear physics research.</span></div> <div> </div> <div>The talk will discuss the general understanding of the origin of the elements in the Universe and highlight how the recent observation of <span style="background-color:initial">merging neutron stars helps to answer this question.</span></div> <div> </div> <div>Decisive progress towards solving this puzzle is also expected from Europe's next-generation large-scale accelerator complex, the Facility <span style="background-color:initial">f</span><span style="background-color:initial">or Antiproton and Ion Research, which is currently under construction in Darmstadt and will allow to experimentally study many of the exotic </span><span style="background-color:initial">nuclear physics processes involved in Nature's main sites for element production.</span></div> seminar: 2D materials beyond graphene<p>Palmstedtsalen, Campus Johanneberg</p><p>​Welcome to an initiative seminar on 2D materials beyond graphene, arranged by the Excellence initiative and Graphene Centre Chalmers.</p>​<div><span style="background-color:initial">The continuing trend to miniaturization of devices in modern technology faces fundamental physical limits of applied materials. The search for novel structures with new functionalities has brought </span><span style="background-color:initial">atomically thin two-dimensional (2D) nanomaterials</span><span style="background-color:initial"> </span><span style="background-color:initial">into the focus of current research. They represent a new class of materials that are characterized by a wide range of exceptional optical, electronic, mechanical, chemical, and thermal properties suggesting technological application in </span><span style="background-color:initial">next-generation flexible and transparent nanoelectronic devices</span><span style="background-color:initial">.</span></div> the driven spin-boson model in a superconducting qubit<p>C511, seminar room,</p><p>​Seminar with Milena Grifoni, University of Regenburg, Germany</p><h5 class="chalmersElement-H5">​Abstract</h5> <div>I will report on experimental and theoretical investigtions of a superconducting qubit strongly coupled to an electromagnetic environment and subjected to a periodic drive<br /></div> This set-up realizes the paradigmatic driven Ohmic spin-boson model, a prominent model to investigate decoherence and relaxation in  open quantum systems. <br />We show that the drive reinforces environmental suppression of quantum coherence, and that a coherent to incoherent transition can be achieved by tuning the drive amplitude. <br />Finaly, localization and even population<br />inversion can be attained by properly tuning the parameters of the coherent drive.<br /><br />Please also see the recent publication:<br />L. Magazzù, P. Forn-Díaz, R. Belyansky, J.-L. Orgiazzi, M. A. Yurtalan, M. R. Otto, A. Lupascu, C. M. Wilson, M. Grifoni: Probing the strongly driven spin-boson model in a superconducting quantum circuit. Nat. Commun. 9, 1403 (2018)<br />,-Microtechnology-and-Nanoscience.aspx,-Microtechnology-and-Nanoscience.aspxJens Schulenborg, Microtechnology and Nanoscience<p>Kollektorn, lecture room,</p><p>Title: Dynamics of open fermionic nano-systems — a fundamental symmetry and its application to electron transport in interacting quantum dots</p>​Jens is a PhD student at the Applied Quantum Physics Laboratory<br />Faculty opponent is: Prof. Dr. Milena Grifoni, Universität Regensburg, Germany<br />Examiner: Professor Göran Johansson <br />Min supervisor: Professor Janine Splettstoesser Relay Race 2018 - 3 October<p>MC2, building complex,</p><p>MC2 Relay Race 2018 is an annual social and sports activity since 2002 among the staff and students at MC2, which during the last years also have included teams from GPC, Acreo and MC2 Master programs. We now invite all employees and masters students to announce their teams for the 16th race.</p><div>​<img src="/en/departments/mc2/calendar/Documents/Relay%20Race%202017.jpg" width="688" height="312" alt="" style="margin:5px" /><br /><br /></div> <div><strong>Team</strong></div> Each team should have 4 runners. Two runners will have the shorter course (ca 1 km) and another 2 runners will have the longer course ( ca 2 km).<br /><div>Please register by sending an e-mail to <a href=""></a> including, team name, team leaders name.</div> <div><span><em>Please note:</em> This year there will be a competition for the best &quot;dress or outfit&quot; for the teams. The first price is truly amazing!</span></div> Each team will receive 4 T-shirts and should pick them up from outside Debora Perlhedens office on the 3rd floor, room D321. (Deboras phone: 772 1878).<br /><br /><strong>Start</strong><br /><div>The warm up will start at 16:00 by ??? (we need to find someone to replace Kaija Matikainen, please let us know if you would like replace Kaija and lead the warm-up this year) and the race will start immediately after that so please be at the event ready before the warm up. Location of Start and Finish will be on the north side of the MC2 building by the D section Hugo Grauers gata 1.</div> <div><br /></div> <div><strong>Prize</strong><br />The first three teams will be awarded. In addition, the MC2 relay race Trophy will be moved to the winner laboratory.<br /></div> Colloquium: Unconditional non-gaussianity as a resource for quantum computation in opto-mechanical systems<p>Kollektorn, lecture room,</p><p>​Talk by Alessandro Ferraro, Queen&#39;s University Belfast, UK</p><h5 class="chalmersElement-H5">​Abstract:</h5> <div>The development of quantum information science aims at exploiting quantum features as technological resources suitable to process information. This endevour has led to the introduction of precise mathematical definitions of various notions of quantum resources, and manipulations thereof. In this talk, I will introduce a resource theory for infinite-dimensional (continuous-variable) quantum systems, grounded on operations routinely available within current technologies. The present theory lends itself to quantify both quantum non-Gaussianity and Wigner negativity as resources. This framework finds immediate application in continuous-variable quantum computation, where the ability to implement non-Gaussian operations is crucial to obtain universal control. In this context, I will illustrate a scheme to arbitrarily process quantum information over mechanical oscillators (e.g., opto- and electro-mechanical systems, photonic crystals, trapped ions, ...). In particular, I will show how universal non-Gaussian gates can be unconditionally attained by making use of cubic non-linearities.<br /><br /></div> Nanogap Devices and Applications<p>PJ, lecture hall,</p><p>Surface-enhanced spectroscopies, sub-volt dielectrophoresis, single-molecule optical trapping ​ Seminar by Dr. Sang-Hyun Oh, University of Minnesota, USA</p><h4 class="chalmersElement-H4">​Abstract:</h4> <div><span style="background-color:initial">​​Nanometer-scale gaps in metals are one of key building blocks for plasmonics and nano-optics. I will present new approaches to (1) manufacture sub-10-nm gaps with uniformity and high throughput; (2) use nanogap electrodes for rapid sample concentration via sub-volt dielectrophoresis; and (3) use a resonant annular nanogap device for optical trapping of single protein molecule. In our scheme, the width of vertically oriented nanogap structure is precisely defined by the thickness of oxide films grown by atomic layer deposition (ALD). By scaling the gap size toward single-nanometer regime, we can perform low-voltage dielectrophoresis trapping of nanoparticles and biomolecules, followed by surface-enhanced spectroscopic detection. With a ring-shaped coaxial nanoaperture, we can generate strong optical resonances that can be tuned from visible to mid-infrared frequencies. We show applications of resonant coaxial nanoapertures for mid-infrared spectroscopy and single-molecule optical trapping. </span></div> <div> </div> Physics Colloquium by Gunnar Westberg<p>PJ, lecture hall,</p><p>​Colloquium by Gunnar Westberg, ICAN (Int. Campain to Abolish Nuclear Weapons).</p> Colloquium: Topological superconductivity in Bi based topological insulators and semimetals<p>Kollektorn, lecture room,</p><p>​Talk by Alexander Brinkman, University of Twente, The Netherlands</p> Sustainability Day 2018<p>Campus Johanneberg, mostly at Chalmers conference centre, Student Union Building</p><p>​Chalmers Sustainability Day is back - Tuesday 23 October 2018. This year’s theme is Good Health and Well-being.</p>​ <br /><div><h5 class="chalmersElement-H5">The programme is launched!</h5> <div>Chalmers Sustainability day will offer an exciting and vast programme, open to all Chalmers employees and students. </div> <div> </div></div> <div>Programme and registration: <a href="/en/about-chalmers/Chalmers-for-a-sustainable-future/sustainability-day2018/Pages/default.aspx">Chalmers Sustainability Day 2018</a></div> <br /><br /> Physics Colloquium by Brian Andersen<p>PJ, lecture hall,</p><p>Title: New Clues to the Mechanism of Unconventional Superconductivity from Spectroscopy and Theory of Iron-based Superconductors</p><h4 class="chalmersElement-H4">​Abstract: </h4> <div><span style="background-color:initial">Ir</span><span style="background-color:initial">on-based superconductors have been extensively studied both experimentally and theoretically over the last decade, with great progress in our understanding of these materials. Recent focus on FeSe has been centered on the connection between nematicity and superconductivity, and the possibility of enhancing Tc in monolayers on STO, or by pressure. In this talk, I will give and overview of recent developments and focus on recent scanning tunneling experiments mapping out the detailed spectroscopic features of FeSe by the group of J. C. Seamus Davis at Cornell University. I will explain the recent evidence for orbital selective superconducting pairing, and the direct detection of orbital selective quasiparticles by quasi-particle interference. This highlights the correlated nature of FeSe, more specifically its Hund’s metal nature with coexisting orbital-dependent coherent and incoherent low-energy states. I then proceed to discuss the theoretical modelling of these phenomena and the implications for our understanding of the origin of superconductivity in FeSe in particular, and in the iron-based superconductors in general.</span></div> ​,-Microtechnology-and-Nanoscience-.aspx,-Microtechnology-and-Nanoscience-.aspxHenrik Staaf, Microtechnology and Nanoscience<p>Kollektorn, lecture room,</p><p>​Title: Conjoined piezoelectric harvesters and carbon supercapacitors for powering intelligent wireless sensors</p>​<span>Henrik is a PhD student at the Electronics Materials and Systems Laboratory <br />Faculty opponent is: Professor Pr. Peter Woias from Albert-Ludwigs-Universität Freiburg, Germany<br />Main supervisor and examiner: Professor Peter Enoksson<br /><span style="display:inline-block"></span></span> Physics Colloquium<p>PJ, lecture hall,</p><p>​​ Lecturer: To be announced​</p> Day Chase-On + GHz Centre<p>Palmstedtsalen, university building,</p><p>​You are invited to an exciting joint Centre Day, co-organised between the centre on antenna systems ChaseOn and the centre on wireless communication and sensor technologies GHz centre.​</p><p class="chalmersElement-P">​<span>The day will </span><span>include technical presentations of all collaborative research projects, an invited talk given by </span><span>Prof.</span><span> Sonia </span><span>Heemtra</span><span> from the Univ. of Eindhoven and lots of opportunities for mingling and networking with other peers, as well as a gala dinner as the icing on the cake.</span></p> <p></p> <p class="chalmersElement-P"> </p> <p></p> <p class="chalmersElement-P"> </p> <p class="chalmersElement-P"><span>Don’t miss the opportunity to get updated on what is happening at  the research forefront of these important technical areas.</span></p> <p class="chalmersElement-P"> </p> Colloquium: Quantum emitters in structured reservoirs: collective effects and quantum simulation<p>Kollektorn, lecture room,</p><p>​Talk by Ignacio Cirac, Max Planck Institute for Quantum Optics, Germany</p> Colloquium: Quantum Cloud Computing<p>Kollektorn, lecture room,</p><p>​Talk by Elham Kashefi, Université Pierre et Marie Curie, France and The University of Edinburgh, UK</p> Physics Colloquium<p></p><p>Colloquium by the Nobel Prize Laureate Takaaki Kajita​.</p> Colloquium: Quantum optics with solid-state artificial atoms<p>Kollektorn, lecture room,</p><p>​Talk by Pascale Sennellart, CNRS/Paris Sud University, France ​</p> the date for the MC2 Christmas Party!<p></p><p></p>