Realization of two-dimensional spin-orbit coupling for Bose-Einstein condensates

被引：693

作者：

Wu, Zhan ^{[1
,2
,3
,4
,5
]}

Zhang, Long ^{[1
,2
,6
,7
]}

Sun, Wei ^{[1
,2
,3
,4
,5
]}

Xu, Xiao-Tian ^{[1
,2
,3
,4
,5
]}

Wang, Bao-Zong ^{[1
,2
,6
,7
]}

Ji, Si-Cong ^{[1
,2
,3
,4
]}

Deng, Youjin ^{[1
,2
,3
,4
,5
]}

Chen, Shuai ^{[1
,2
,3
,4
,5
]}

Liu, Xiong-Jun ^{[6
,7
]}

Pan, Jian-Wei ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Sci & Technol China, Natl Lab Phys Sci Microscale, Shanghai Branch, Shanghai 201315, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Shanghai 201315, Peoples R China

[3] Chinese Acad Sci, Ctr Excellence, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China

[5] Chinese Acad Sci, Alibaba Quantum Comp Lab, Shanghai 201315, Peoples R China

[6] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[7] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

来源：

SCIENCE | 2016年 / 354卷 / 6308期

基金：

中国国家自然科学基金;

关键词：

TOPOLOGICAL INSULATORS; SUPERCONDUCTORS;

D O I：

10.1126/science.aaf6689

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Cold atoms with laser-induced spin-orbit (SO) interactions provide a platform to explore quantum physics beyond natural conditions of solids. Here we propose and experimentally realize two-dimensional (2D) SO coupling and topological bands for a rubidium-87 degenerate gas through an optical Raman lattice, without phase-locking or fine-tuning of optical potentials. A controllable crossover between 2D and 1D SO couplings is studied, and the SO effects and nontrivial band topology are observed by measuring the atomic cloud distribution and spin texture in momentum space. Our realization of 2D SO coupling with advantages of small heating and topological stability opens a broad avenue in cold atoms to study exotic quantum phases, including topological superfluids.

引用

页码：83 / 88

页数：6

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