【学术视频】Non-Hermitian Topology and Dynamics | 中国科大陈帅教授

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图 | 陈帅

题   目：Explore topology of quantum gases by quench dynamics报告人：陈帅单   位：中国科学技术大学时   间：2019-11-30地   点：复旦大学

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报告摘要

The central role of quantum simulation via ultracold quantum gases is to synthesize an effective target Hamiltonian and studies the evolution or the phases of the atoms in such a system. The topological quantum matter and topological phase transition attracted many of the researchers in recent years. Here, we report the synthesis of the 2D Spin-Orbit coupled ultracold Bose gas by Raman coupling lattices. It is a "Quantum Anomalous Hall" model with topological non-trivial band structure. The topology of this system is explored by quench dynamics. By quench the Raman detuning, the band inversion surface (BIS) of the 2D topological system has been clearly observed from the time evolution of the spin-polarization pattern in the First Brillouin Zone. The topological phase boundary has been precisely determined. By quench the phase of the Raman coupling, we have further observed the topological charge in the system and obtain the winding of the spin on the BIS, which determined the Chern number of the system. Our work provides a simple and powerful tool to explore the topological properties. 

个人简介

陈帅，中国科学技术大学／中国科学院量子信息与量子技术创新研究院教授，入选中国科学院人才计划并获择优支持（2009年）。1997年7月毕业于吉林大学，获理学学士学位，2005年1月毕业于北京大学物理学院，获理学博士学位。2005年至2009年任德国海德堡大学博士后，2009年至今任中国科学技术大学教授。主要从事超冷原子物理量子模拟、量子光学和量子精密测量方面的研究。目前在科技部重点专项超冷原子的量子模拟项目中担任课题负责人。

会议简介

会议名称：Fudan Mini-program on Non-Hermitian Topology and Dynamics

会议时间：2019年11月30日-12月1日

会议地点：上海

主办方：复旦大学

—— ——往期精彩回顾—— ——●【学术视频】Non-Hermitian Topology and Dynamics | 南方科技大学陈伟强教授：Classification of topological phases in one dimensional interacting non-Hermitian systems and emergent unitarity●【学术视频】Non-Hermitian Topology and Dynamics | 北京计算科学研究中心薛鹏教授：Parity-time-symmetric quantum walks●【学术视频】太赫兹电磁波与量子材料相互作用学术研讨会 | 中科院固体物理研究所苏付海研究员：Probing ultrafast photocarrier dynamics of 2D materials under high pressure●【学术视频】慕尼黑工业大学Roland A. Fischer教授：Integration of Metal-Organic Frameworks to Devices: SURMOF-Derived Electrocatalysts for Water-Splitting and Fuel Cell ApplicationsEND

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