Events: Global events at Chalmers University of TechnologyFri, 27 Mar 2020 19:46:36 +0100 Public Buildings 2035<p>Museum of World Culture, Studio, Gothenburg</p><p>​The Public Buildings Studio (CTH, School of Architecture) welcomes everyone living in Gothenburg — architects and non-architects alike — to partake debating a specific question: &quot;Can more and better public buildings be incorporated into the city&#39;s 5 million m² of future private development projects?</p>​<span style="background-color:initial">The symposium aims to explore how we (as citizens) feel about the quantity and quality of public buildings currently considered in the predominantly private Älvstaden / RiverCity Gothenburg urban development projects (homes, hotels, offices, retail).</span><div><br /></div> <div>If there's simply no money for more and better public buildings, should we consider ideas for adding value to private buildings through public program? Would this require changes in how we perceive, expect, or legally allow private and public spaces to coexist in the city?</div> <div><br /></div> <div>Using their ongoing hybrid building projects and studies of 5 public building types (bathhouse, library, museum, performing arts center, sportshall) 20 graduate-level architecture students and teachers will curate an open symposium concerning the future of public buildings in Gothenburg.</div> <div><br /></div> <div>Let's debate!</div> <div><br /></div> <div>Moderator:</div> <div>Chalmers University of Technology</div> <div>Graduate School of Architecture</div> <div>Public Buildings Studio</div> <div>English + Swedish</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/ACE/kalendarium/2020/public-buildings-2035_750.jpg" alt="" style="margin:5px" /><br /><br /><br /></div> Parity-Time-symmetric optics, extraordinary momentum and spin in evanescent waves, optical analog of topological insulators, and the quantum spin Hall effect of light<p>Kollektorn, lecture room, Kemivägen 9, MC2-huset</p><p>​Welcome to a Linnaeus Colloquium with Franco Nori, RIKEN, Japan The colloquim by Franco Nori, RIKEN, scheduled on 29 April, has been cancelled due to the corona virus situation.​</p><strong>Abstract:</strong><br /><div><div>This talk provides a brief overview to some aspects of parity-time symmetric optics, extraordinary momentum and spin in evanescent waves, optical analog of topological insulators, and the quantum spin Hall effect of light.  </div> <div> </div> <div>1.<span style="white-space:pre"> </span>Parity-Time-Symmetric Optics </div> <div>Optical systems combining balanced loss and gain provide a unique platform to implement classical analogues of quantum systems described by non-Hermitian parity–time (PT)-symmetric Hamiltonians [1]. Such systems can be used to create synthetic materials with properties that cannot be attained in materials having only loss or only gain. We report PT-symmetry breaking in coupled optical resonators. We observed non-reciprocity in the PT-symmetry-breaking phase due to strong field localization, which significantly enhances nonlinearity. In the linear regime, light transmission is reciprocal regardless of whether the symmetry is broken or unbroken. We show that in one direction there is a complete absence of resonance peaks whereas in the other direction the transmission is resonantly enhanced, which is associated with the use of resonant structures. Our results could lead to a new generation of synthetic optical systems enabling onchip manipulation and control of light propagation. </div> <div> </div> <div>2.<span style="white-space:pre"> </span>The quantum spin Hall effect of light: photonic analog of 3D topological insulators. </div> <div>Maxwell’s equations, formulated 150 years ago, ultimately describe properties of light, from classical electromagnetism to quantum and relativistic aspects. The latter ones result in remarkable geometric and topological phenomena related to the spin-1 massless nature of photons. By analyzing fundamental spin properties of Maxwell waves, we show [2] that free-space light exhibits an intrinsic quantum spin Hall effect —surface modes with strong spin-momentum locking. These modes are evanescent waves that form, for example, surface plasmon-polaritons at vacuum-metal interfaces. Our findings illuminate the unusual transverse spin in evanescent waves and explain recent experiments that have demonstrated the transverse spin-direction locking in the excitation of surface optical modes. This deepens our understanding of Maxwell’s theory, reveals analogies with topological insulators for electrons, and offers applications for robust spindirectional optical interfaces.  Related work can be found in [3]. </div></div> <div><br /></div> <div><a href="/en/departments/mc2/calendar/Documents/franco_nori.pdf"><img class="ms-asset-icon ms-rtePosition-4" src="/en/departments/mc2/calendar/_layouts/images/icpdf.png" alt="" />Abstract and references (pdf</a>)</div> <div><br /></div> ​ Flat Bands in Flatlands<p>Kollektorn, lecture room, Kemivägen 9, MC2-huset</p><p>​The seminar is cancelled due to the Corona virus outbreak.​Graphene Centre Seminar with ChunNing (Jeanie) Lau, Ohio, USA</p> Catching and reversing a quantum jump mid-flight<p>Kollektorn, lecture room, Kemivägen 9, MC2-huset</p><p>The joint Linnaeus and GPC Colloquium with Michel Devoret, Yale University, USA​ is cancellec due to the corona virus situation.</p><div><span style="font-weight:700"><img src="/SiteCollectionImages/Institutioner/MC2/Föreläsningar/M%20Devoret.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;height:235px;width:200px" />Abstract:</span></div> <div>Measurements in quantum physics, unlike their classical physics counterparts, can fundamentally yield discrete and random results. Historically, Niels Bohr was the first to hypothesize that quantum jumps occurred between two discrete energy levels of an atom. Experimentally, quantum jumps were only directly observed many decades later, in an atomic ion driven by a weak deterministic force under strong continuous energy measurement. The times at which the discontinuous jump transitions occur are reputed to be fundamentally unpredictable. Despite the non-deterministic character of quantum physics, is it possible to know if a quantum jump is about to occur? </div> <div>Our work<span style="font-size:10.5px;line-height:0;vertical-align:baseline;top:-0.5em">1</span> provides a positive answer to this question: we experimentally show that the jump from the ground state to an excited state of a superconducting artificial three-level atom can be tracked as it follows a predictable “flight” by monitoring the population of an auxiliary energy level coupled to the ground state. The experimental results demonstrate that the evolution of the jump — once completed — is continuous, coherent, and deterministic. Based on these insights and aided by real-time monitoring and feedback, we then pinpoint and reverse one such quantum jump “mid-flight”, thus deterministically preventing its completion. Our findings, which agree with theoretical predictions essentially without adjustable parameters, lend support to the modern formulation of quantum trajectory theory; most importantly, they may provide new ground for the exploration of real-time intervention techniques in the control of quantum systems, such as the early detection of error syndromes.</div> <div><br /></div> <div>1.<span style="white-space:pre"> </span>Z. Minev et al., Nature 570, 200–204 (2019)</div> <div><br /></div> LCA conference<p>Campus Johanneberg, campus, Göteborg</p><p>​Impacts, Interests, Interactions</p><div>​<br /></div> <div>Welcome to the 7th international conference on Social Life Cycle Assessment that this year will be held in Gothenburg, Sweden, June 14-17, 2020 hosted in collaboration with the Swedish Life Cycle Center at Chalmers.<br /></div> and lecture – Gothenburg Lise Meitner Award 2020<p>FB, lecture hall, Fysikgården 4, Fysik Origo</p><p>​Professor Anne L’Huillier, Lund University, Sweden is the winner of the Gothenburg Lise Meitner Award 2020. She will visit the Gothenburg Physics Centre to receive the award and give the traditional award lecture in honour of the Austrian-Swedish physicist Lise Meitner. ​ Professor L’Huillier receives the award “For pioneering contributions to attosecond laser science and technology”. ​</p><img src="/SiteCollectionImages/Centrum/Fysikcentrum/Gothenburg%20Lise%20Meitner%20Award/Lise%20Meitner%202020/150_Anne_H_.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:110px;height:146px" />Professor Anne L'Huillier has been at the forefront of ultrafast laser science since its inception, with her pioneering contributions to high-order harmonic light generation, which is a base technology for attosecond science. Her research has helped foster the field of attosecond science, allowing scientists to visualize the movements of electrons in light-induced processes, which can be used to understand chemical reactions on the atomic level.​<br /> Conference on Urban Freight<p>Lindholmen Science Park, science park, Lindholmen</p><p>​The 4th VREF Conference on Urban Freight will present current issues influencing urban freight research and discuss the complexity of designing urban space and managing flows for liveable cities.</p>!.aspx!.aspxSave the Date for Act Sustainable!<p>Chalmers &amp; University of Gothenburg</p><p>​Make a mark in your calendars for November 16-20, the University of Gothenburg and Chalmers´ sustainability week will be back this fall!</p>​2020 is a big year for sustainable development in general, and a huge year for Act Sustainable. Just to mention a few highlights - the United Nations have declared this decade the Decade of action for realizing Agenda 2030 and the Global Goals, and Act Sustainable is celebrating its 15th anniversary. <br /> <br />More information to come, follow us on Facebook to be sure not to miss anything: <br /><a href=""><span>The Act Sustainable event!</span> <br /></a><a href=""><span>@GMVcentrum</span> <br /></a><a href=""><span><span>@Gothenburg Student Sustainability Hub</span> <br /> </span></a><br /><b>Save the date for Act Sustainable 2020, November 16-20!</b> 2nd International Conference on Negative CO2 Emissions<p>Chalmers Student Union Building, Chalmers Campus Johanneberg</p><p>​The 2nd International Conference on Negative CO2 Emissions will be held May 18-21, 2021, at Chalmers University of Technology, Gothenburg, Sweden. The purpose of this conference series is to bring together a wide range of scientists, experts and stakeholders, in order to engage in various aspects of research relating to negative CO2 emissions. This will include various negative emission technologies, climate modelling, climate policies and incentives. The main topics of the conference, around which the sessions will be built, include:</p><ul><li>​<span style="font-size:14px"><span style="background-color:initial">BECCS</span></span></li> <li><span style="font-size:14px">Biospheric storage</span></li> <li><span style="font-size:14px">Cross-cutting sessions</span></li> <li><span style="font-size:14px">Direct air capture</span></li> <li><span style="font-size:14px">Enhanced weathering</span></li> <li><span style="font-size:14px">Modeling</span></li> <li><span style="background-color:initial">Ocean alkalization</span></li></ul> <span></span> <div><span style="font-size:14px"></span><span></span><div><span style="font-size:14px"><strong>Background</strong></span></div> <div><span style="font-size:14px">The objective of the Paris Agreement is to limit global warming to well below 2ºC, and to pursue efforts to limit the temperature increase to 1.5ºC. The carbon budget is the amount of carbon dioxide that we can emit while still limiting global temperature rise to a given level, for example 1.5ºC.</span></div></div> <div><br /></div> <div><span style="background-color:initial;font-size:14px"></span><strong>Read more and sign up to the conference:</strong><br /><a href=""><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />The 2nd International Conference on Negative CO2 Emissions​</a><br /></div>