本学期学术活动
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2023-0216
报告题目：Unconventional Spin Currents in Antiferromagnets报告人：邵定夫，中国科学院固体物理研究所时间地点：2023-02-21 (周二上午） 10：00 理科楼C302（物理系三层报告厅）联系人：于浦教授Abstract: Spintronics is a research field that exploits magnetic order parameters as the state variable in electronic devices, such as nonvolatile memories and logics. Spin currents play a central role in spintron...
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2023-0214
Title: Bootstrap Our Way towards Inflationary New PhysicsSpeaker: Dong-Gang Wang 王东刚 (University of Cambridge)Time: 2:00pm, Feb 14 (Tuesday) 2023Location: 理科楼C302Abstract: Cosmological correlation functions contain valuable information about the primordial Universe, with possible signatures of new physics at extremely high energies. Recently, the advances of the ”cosmological bootstrap”...
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2023-0205
标题: Anomalous dynamics and associated phenomena in topological systems out of equilibrium报告人：孙孝奇 University of Illinois at Urbana-Champaign报告时间：2023年2月8日（周三）上午9：00-10：30腾讯会议ID: 653-214-168摘要：In 1981, Nielsen and Ninomiya proved that chiral modes cannot emerge from a static lattice system without partners of opposite chirality. Even though the theorem was original...
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2023-0205
标题: Engineering quantum magnetic materials报告人：王冲 美国华盛顿大学报告时间：2023年2月7日（周二）上午9：00-10：30腾讯会议ID: 162-440-504摘要: Magnets play a vital role in modern technology. Ferromagnets, for example, use collective aligned spins in magnetic domains to store information. But if neighboring spins are allowed to point in different directions, many new possibilities arise. This...
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2023-0202
报告人：Yi Yang，University of California, Berkeley报告时间：2023年2月6日（周一）上午9：00腾讯会议ID: 381-746-851Abstract:The geometry of supernovae and other cosmic explosions contains critical information about their mysterious nature. However, those events are too far to be spatially resolved even using the biggest telescopes. The most effective way to probe their shapes is polarimetry. For ...
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2023-0131
报告人：朱国毅 德国科隆大学理论物理研究报告时间：2023年2月2日（周四）下午2：00-3：30报告方式：腾讯会议ID: 129-492-069Abstract:The advent of noisy-intermediate-scale quantum processors provide a new opportunity to hunt for long-range entangled (LRE) states. However, the local unitary circuit spreads entanglement in a way bounded by the information lightcone, and is thus halted by a linear wall o...
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2022-1220
Title: Renormalization-group Perspective on Gravitational Critical CollapseSpeaker: Huan Yang (Perimeter Institute for Theoretical Physics)Time: 4:00pm, Dec 22 (Thursday) 2022腾讯会议: 814-2523-8667Abstract: In this talk, we discuss how to interpret the critical gravitational collapse processes via renormalization group (RG). As an instructive example, we propose extremal black holes (BH) as cr...
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2022-1213
Title: New Physics of Spontaneous Symmetry Breaking in the Early UniverseSpeaker: Ligong Bian (边立功)Time: 4:00pm, Dec 15 (Thursday) 2022腾讯会议: 814-2523-8667Abstract: A strong first-order electroweak phase transition provides a possible mechanism to generate baryon asymmetry in the early universe, and it may impact on the thermal environment of dark matter formation and evolution. Also, gra...
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2022-1206
Title: Testing Gravity with PulsarsSpeaker: Lijing Shao (邵立晶)Time: 1:30pm, Dec 08 (Thursday) 2022腾讯会议: 814-2523-8667Abstract: Einstein’s general relativity has passed enormous tests with flying colours, ranging from the Solar System, binary pulsars, gravitational waves, to cosmology. Binary pulsars, being in a strong-field regime with quasi-stationary orbital motion, are excellent testb...
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2022-1202
Title: Revisit the Decoherence of Cosmological Perturbations with the Development of Quantum InformationSpeaker: Chon Man Sou (HKUST)Time: 1:30pm, Dec 05 (Monday) 2022腾讯会议: 918-999-658Abstract: In the past, the quantum-to-classical transition of inflationary cosmological perturbations more focused on explaining today’s classical observations which originate from quantum vacuum fluctuation,...
