本学期学术活动
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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...
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2022-1116
报告题目：Electron microscopy for physicists: From ultimate resolution to quantum states报告人：陈震 副研究员，清华大学材料学院时间：2022年11月15日上午10:00地点：理科楼C302报告摘要：Improvements in electron microscopy have provided many new opportunities to explore multiple degrees of freedom in condensed matter physics, well beyond the lattice. Now, we can detect every electron scattered by a ...
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2022-1102
报告题目:物理系colloquium: Quantum Chaos and Physical Distance Between Quantum States报告人:Biao Wu (吴飙)Peking University （北京大学）报告时间:2022-11-03 16:00报告地点:理科楼郑裕彤讲堂主办单位:物理系简介:It has been long argued and accepted that there is no true quantum chaos due to the linearity of the Schrödinger equation. Berry even suggested to change quantum chaos, a confusing oxymoron, ...
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2022-1031
题目：Probing magnetic phase diagrams of two-dimensional antiferromagnets报告人：叶堉 副教授，北京大学物理学院时间：2022年11月1日上午10:00地点：理科楼C302报告摘要：Two-dimensional (2D) magnets decouple from the substrates, allow electrical control, and are mechanically flexible, making them integratable into emergent heterostructures for advanced properties and applications previously impossibl...
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2022-1027
报告题目:物理系colloquium: “鬼”成像向更短波长发展报告人:吴令安中国科学院物理研究所报告时间:2022-10-27 16:00报告地点:理科楼郑裕彤讲堂主办单位:物理系简介:经过二十多年的发展，“鬼”成像（也可叫单像素成像）在可见和近红外波段已进入实际应用阶段。从理论上讲，电磁波的各个波长甚至微观粒子都可以实现鬼成像，其基本原理基于Hanbury Brown和Twiss的二阶强度关联函数。它的最大优势是可以透过散射介质、在微弱的照...
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2022-1026
Title: A Gigaparsec-scale Local Void and Cosmological PrincipleSpeaker: Qianhang Ding (the Hong Kong University of Science and Technology)Time: 3:30pm, Oct 26 (Wednesday) 2022Location: New Science Building (理科楼) A221Abstract: In this talk, I will introduce the inconsistency between the cosmological principle and observations. In reconciling the inconsistency, we propose that the Milky Way co...
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2022-1026
题目：复杂量子系统的大尺度模拟报告人：袁声军 教授，武汉大学物理科学与技术学院时间：2022年10月26日下午14:00会议号：腾讯会议164-497-881，https://meeting.tencent.com/dm/QUSCZlMKKJgc报告摘要：复杂量子系统的理论问题通常没有解析解，需借助计算物理方法进行数值求解。常规方法往往需要对体系哈密顿量进行对角化运算，以得到其本征值和本征态，这使得计算消耗和哈密顿量维度三次方成正比，极大限制了研究系统的尺度。...
