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【直播】【北大物理学院学术论坛】Hugues Chaté：Long-range orientational order...
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本次报告由北京大学物理学院、量子材料科学中心、北京物理学会主办，于2021年10月15日15:00开始，授权蔻享学术进行网络直播。
Long-range orientational order in 2D active matter
报告人
Hugues Chaté | Beijing Computational Science Research Center
时间
2021年10月15日15:00
报告摘要
The birth of active matter physics may be traced back to 1995, when Tamas Vicsek and collaborators proposed to see collective motion as a spontaneously broken symmetry phase and introduced the now-famous Vicsek model. The same year, John Toner and Yuhai Tu, inspired by Vicsek, wrote down a field theory for this flying XY spin model, and obtained their landmark result: polar flocks can exhibit true long-range orientational order even in 2D. Before coming back to these results, The report will first give a brief introduction to active matter; then offer an updated view of dry aligning dilute active matter (DADAM), where self-propelled point particles locally align their velocities in the presence of noise; Nnext discuss some key facts and issues related to the various instances of long-range order presented by DADAM, including recent results showing that true long-range orientational order is also possible in 2D active nematics; finally, discuss the robustness of the long-range ordered phases to various types of disorder.
报告人介绍
图 | Hugues Chaté
Hugues Chaté is a Research Director at French Alternative Energies and Atomic Energy Commission (CEA) Paris-Saclay, a Chair Professor at Beijing Computational Science Research Center and a Divisional Associate Editor of Physical Review Letters. He obtained his Ph. D. in 1989 from Université Pierre & Marie Curie in Paris. After a short postdoctoral stay at Bell Laboratories, he joined the condensed matter physics department in Saclay. He was the leader of the Advanced Study Group “Statistical Physics of Collective Motion” at the Max Planck Institute for the Physics of Complex Systems in Dresden, Germany. He has been selected as The Recruitment Program of Global Experts (Year) and American Physical Society Fellow (2014).Hugues Chaté’s research covers a wide range of topics ranging from nonlinear dynamics to statistical physics and critical phenomena. He has played a seminal role in the development of the field of active matter, with key papers published on minimal models and their theoretical understanding as well as works in collaborations with leading experimentalists working on animal collective behavior, bacteria colonies, and in vitro mixtures of biofilaments and motor proteins. Hugues Chaté has written over 160 scientific papers, with about a third published in Physical Review Letters.
北京大学物理学院 (School of Physics, Peking University) 是北京大学的二级学院。北京大学1913年设立物理学门，我国物理学本科教育从此开始。1919年更名为物理系。抗战时期，北大、清华、南开三校物理系合并于西南联合大学。1952年全国院系调整后，北京大学物理系集原北大、清华、燕大三校物理精英成为我国高校实力最强的物理重镇，并先后创办或参与创建全国高校第一个核科学专业、半导体物理专业、地球物理专业、微电子专业等。2001年，北京大学物理学院在原物理系以及重离子物理研究所、技术物理系核物理专业、地球物理系大气物理与气象专业、天文系的基础上组建成立。据2020年1月学校官网显示，学校下设2个教学实体单位，拥有4个一级学科博士点及博士后流动站、2个国家一级重点学科，有教学科研队伍170余人。
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