学术活动
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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,...
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2022-1129
Title: Search for Particle Dark Matter with Radio Astronomical ObservationsSpeaker: Qiang Yuan (袁强)Time: 1:30pm, Dec 01 (Thursday) 2022腾讯会议: 814-2523-8667Abstract: The nature of dark matter remains one of the most interesting problems in physics and astronomy. There are many kinds of candidates of dark matter, which result in big challenges in detecting it experimentally. This talk will i...
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2022-1123
Title: Recent Progress in the Study of Primordial Black Holes.Speaker: Sai Wang (王赛)Time: 1:30pm, Nov 24 (Thursday) 2022腾讯会议: 814-2523-8667Abstract: The idea of primordial black holes (PBHs), first introduced by Stephen Hawking, is not only a possible solution to the dark matter problem, but also a unique tracer of the dynamics of inflation in the early universe. Also, PBHs are crucial to...
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2022-1116
Title: Perturbative Causal Shadows in AdS/CFTSpeaker: Hua-Jia Wang (王华嘉)Time: 1:30pm, Nov 17 (Thursday) 2022Location: New Science Building (理科楼) C302Abstract: Bulk reconstruction is an important subject in AdS/CFT that aims to reveal the underlying mechanism of the duality. In the context of subregion duality, there is a notion called the causal shadow that emerges from the entanglement w...
