题目：2D Spin-Orbit coupling and its topology

报告人：陈帅 中国科学技术大学近代物理系        

            中国科学院量子信息与量子技术创新研究院

地点： 教十二-201

时间： 5月11日，周五，15:00-16:00

摘要：

Spin-Orbit (SO) coupling, as a fundamental quantum effect,is an essential ingredient in many topological phases of quantum matters, like topological insulator and topological semiconductor. To synthesize 2-dimensional (2D) SO coupling with ultracold quantum gases is one of the keys in the field of quantum simulation for study topological quantum matters. We report here the realization of a robust and highly controllable 2DSO coupling with topological non-trivial band structure.By applying a retro-reflected 2D optical lattice, the phase tunable Raman couplings are formed into the anti-symmetric optical Raman lattice structure, and generate the 2D SO coupling with precise inversion and C4 symmetries. Further, the topological features of the 2D SO coupling are precisely addressed by both equilibrium and non-equilibrium processes. Our study open the new avenue in quantum simulation to explore exotic quantum many-body effects and non-equilibrium dynamics with novel topology.

References:

(1) Zhan Wu, Long Zhang,Wei Sun, Xiao-TianXu,Bao-Zong Wang, Si-Cong Ji, Youjin Deng, Shuai Chen,*Xiong-Jun Liu,* Jian-Wei Pan*, Realization of 2-dimenstional Spin-Orbit coupling for Bose-Einstein condensate, Science 354, 83-88 (2016)

(2) Bao-Zong Wang, Yue-Hui Lu, Wei Sun, Shuai Chen*, Youjin Deng, and Xiong-Jun Liu*, Dirac-, Rashba-, and Weyl-type spin-orbit couplings: Toward experimental realization in ultracold atoms, Phys. Rev. A 97, 011605(R) (2018)

(3) Wei Sun, Bao-Zong Wang,Xiao-TianXu,Chang-Rui Yi,Long Zhang,Zhan Wu,Youjin Deng,Xiong-Jun Liu,Shuai Chen,and Jian-Wei Pan, Long-Lived 2D Spin-Orbit Coupled Topological Bose Gas, arXiv: 1710.00717

(4) Wei Sun,Chang-Rui Yi,Bao-Zong Wang,Wei-Wei Zhang,BarryC. Sanders, Xiao-TianXu,Zong-Yao Wang,JoergSchmiedmayer, Youjin Deng,Xiong-Jun Liu,Shuai Chen*, and Jian-Wei Pan*, Uncover topology by Quantum quench dynamics, arXiv: 1804.08226

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，入选中国科学院百人计划（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。近年来在Science (1篇)、Nature (1篇)、Nature子刊(4篇)、Physical Review Letters (6篇)等国际权威学术期刊上发表20余篇研究论文。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。

欢迎老师和同学参加！