Händelser: Globalhttp://www.chalmers.se/sv/om-chalmers/kalendariumAktuella händelser på Chalmers tekniska högskolaMon, 06 Apr 2020 08:44:05 +0200http://www.chalmers.se/sv/om-chalmers/kalendariumhttps://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/GCC-Ensslin.aspxhttps://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/GCC-Ensslin.aspxINSTÄLLT - Quantum devices in bilayer graphene<p>Kollektorn, lecture room, Kemivägen 9, MC2-huset</p><p>​​Graphene Centre seminariet med Klaus Ensslin, ETH, Zurich , Schweiz är inställt på grund av coronaviruset.</p>https://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/LC-Franco-Nori.aspxhttps://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/LC-Franco-Nori.aspxINSTÄLLT: 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>​Välkommen till ett Linnaeus Colloquium med Franco Nori, RIKEN, JapanKollokviet är inställt på grund av  rådande omständigheter kring Coronaviruset.</p><b>​Abstrakt:</b><div><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> </div>https://www.chalmers.se/sv/styrkeomraden/produktion/kalendarium/Sidor/Produktion-i-rymden.aspxhttps://www.chalmers.se/sv/styrkeomraden/produktion/kalendarium/Sidor/Produktion-i-rymden.aspxINSTÄLLT: Produktion i rymden<p>RunAn, conference hall, Chalmersplatsen 1, Kårhuset</p><p>Vi planerar att flytta seminariet till hösten. Håll utkik efter nytt datum.</p>​Den nya rymdåldern är här! Det tar vi fasta på i årets initiativseminarium som spinner vidare på 50-årsfirandet av månlandningen.​​<div><span style="background-color:initial">Hur tillverkar man för rymden? Vad forskar man på i rymden? Kan man tillverka produkter på Mars? Och hur bidrar Chalmers till rymdteknik och forskning? Det är några av de frågor vi kommer att lyfta under temat: Produktion i rymden.<br /></span> ​</div>https://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/GCC-Lau.aspxhttps://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/GCC-Lau.aspxINSTÄLLT: Flat Bands in Flatlands<p>Kollektorn, lecture room, Kemivägen 9, MC2-huset</p><p>Graphene Centre Seminar med ChunNing (Jeanie) Lau, Ohio, USA Tyvärr inställt på grund av rådande omständigheter kring Coronaviruset.</p>https://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/LC-Michel-Devoret.aspxhttps://www.chalmers.se/sv/institutioner/mc2/kalendarium/Sidor/LC-Michel-Devoret.aspxINSTÄLLT - Catching and reversing a quantum jump mid-flight<p>Kollektorn, lecture room, Kemivägen 9, MC2-huset</p><p>Joint Linnaeus and GPC Colloquium with Michel Devoret, Yale University, USA Inställt på grund av situationen med corona virus.</p><div><b><img src="/SiteCollectionImages/Institutioner/MC2/Föreläsningar/M%20Devoret.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:200px;height:235px" />Abstrakt:</b></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<sup>1</sup> 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> <div></div> https://www.chalmers.se/sv/institutioner/tme/kalendarium/Sidor/Social-LCA-conference.aspxhttps://www.chalmers.se/sv/institutioner/tme/kalendarium/Sidor/Social-LCA-conference.aspxSocial LCA conference<p>Campus Johanneberg, campus, Göteborg</p><p>​Impacts, Interests, Interactions</p><div>​</div> <div>Välkommen till den 7:e internationella konferensen inom Social Life Cycle Assessment som denna gång kommer hållas i Göteborg den 14-17 juni 2020, med Swedish Life Cycle Center vid Chalmers som värd.</div>https://www.chalmers.se/sv/centrum/fysikcentrum/kalendarium/Sidor/Lise-Meitner-award-2020.aspxhttps://www.chalmers.se/sv/centrum/fysikcentrum/kalendarium/Sidor/Lise-Meitner-award-2020.aspxPrisceremoni och föreläsning – Göteborgs Lise Meitnerpris 2020<p>FB, lecture hall, Fysikgården 4, Fysik Origo</p><p>​​ 2020 års pristagare av Göteborgs Lise Meitner pris är professor Anne L’Huillier verksam vid Lunds universitet. Den 24 september besöker hon Fysikcentrum Göteborg och tar emot utmärkelsen. I samband med prisceremonin håller professor L’Huillier traditionsenligt en föreläsning i den österrikiska/svenska fysikerns ära.  Välkommen att delta!Förfriskningar serveras efter föreläsningen.​ Läs mer om Anne L’Huillier​ på vår engelska sida​ Läs mer om Lise Meitner award</p>https://www.chalmers.se/sv/institutioner/tme/kalendarium/Sidor/VREF-Conference-on-Urban-Freight-2020.aspxhttps://www.chalmers.se/sv/institutioner/tme/kalendarium/Sidor/VREF-Conference-on-Urban-Freight-2020.aspxVREF Conference on Urban Freight<p>Lindholmen Science Park, science park, Lindholmen</p><p>​ Den 4:e VREF konferensen om Urban Freight kommer att presentera aktuella frågeställningar som påverkar stadstransportforskning och diskutera komplexiteten med utformning av stadsmiljöer och flödeshantering för beboeliga städer.</p>https://www.chalmers.se/sv/centrum/gmv/kalendarium/Sidor/Save-the-Date-för-Act-Sustainable.aspxhttps://www.chalmers.se/sv/centrum/gmv/kalendarium/Sidor/Save-the-Date-f%C3%B6r-Act-Sustainable.aspxSave the Date för Act Sustainable<p>Chalmers &amp; Göteborgs universitet</p><p>​Boka 16-20 november i alla dina kalendrar, Chalmers och Göteborgs universitets hållbarhetsvecka kommer tillbaka i höst!</p>​2020 är ett stort år för hållbar utveckling generellt och ett väldigt stort år för hållbarhetsveckan Act Sustainble. Det här årtiondet har förkunnats av FN som <i>The Decade of Action</i>, årtiondet för handling, för att genomföra Agenda 2030 och de Globala målen för hållbar utveckling och Act Sustainable firar sitt 15-årsjubileum. Bara för att nämna två av årets höjdpunkter! <br /> <br />Mer information kommer, följ oss på Facebook för att vara helt säker på att du inte missar något: <br /> <br /><a href="https://www.facebook.com/events/128189121945141/"><span>A</span><span>ct</span><span> Sustainable-eventet</span> </a><a href="https://www.facebook.com/GMVcentrum/"><div>@GMVcentrum</div></a><a href="https://www.facebook.com/GothenburgStudentSustainabilityHub/"><div><span>@Goth</span><span>enburg Student </span><span>Sustaina</span><span>bility</span><span> Hub</span> </div> <div></div> </a><br /><b>Save the date för Act Sustainable 2020, 16-20 november!</b>https://www.chalmers.se/sv/styrkeomraden/energi/kalendarium/Sidor/The-2nd-International-Conference-on-Negative-CO2-Emissions.aspxhttps://www.chalmers.se/sv/styrkeomraden/energi/kalendarium/Sidor/The-2nd-International-Conference-on-Negative-CO2-Emissions.aspxFRAMSKJUTET: The 2nd International Conference on Negative CO2 Emissions<p>Chalmers Kårhus, 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><span class="text-normal page-content"><ul><li><span style="background-color:initial">Biospheric storage</span><br /></li> <li>Cross-cutting sessions</li> <li>Direct air capture</li> <li>Enhanced weathering</li> <li>Modeling</li> <li><span style="background-color:initial">Ocean alkalization</span></li></ul> <div><div><span style="font-weight:700">Background</span></div> <div>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.</div></div> <div><br /></div> <div><span style="background-color:initial"></span><span style="font-weight:700">Read more and sign up to the conference:</span><br /><a href="http://negativeco2emissions2020.com/"><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> <div><br /></div></span>