Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling

doi:10.1088/1674-1056/24/6/060305

中国物理B ›› 2015, Vol. 24 ›› Issue (6): 60305-060305.doi: 10.1088/1674-1056/24/6/060305

Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling

解文方^a, 贺彦章^b, 鲍诚光^b

a School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China;
b School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China

收稿日期:2014-11-06 修回日期:2015-01-16 出版日期:2015-06-05 发布日期:2015-06-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10874249).

Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling

Xie Wen-Fang (解文方)^a, He Yan-Zhang (贺彦章)^b, Bao Cheng-Guang (鲍诚光)^b

a School of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, China;
b School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China

Received:2014-11-06 Revised:2015-01-16 Online:2015-06-05 Published:2015-06-05
Contact: Bao Cheng-Guang E-mail:stsbcg@mail.sysu.edu.cn
About author:03.75.Kk; 03.75.Mn; 03.75.Nt
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10874249).

摘要/Abstract

摘要： The evolution of two-component cold atoms on a ring with spin–orbit coupling has been studied analytically for the case with N noninteracting particles. Then, the effect of interaction is evaluated numerically via a two-body system. Two cases are considered: (i) Starting from a ground state the evolution is induced by a sudden change of the laser field, and (ii) the evolution starting from a superposition state. Oscillating persistent spin-currents have been found. A set of formulae have been derived to describe the period and amplitude of the oscillation. Based on these formulae the oscillation can be well controlled via adjusting the parameters of the laser beams. In particular, it is predicted that movable stripes might emerge on the ring.

关键词: light-induced spin-orbit coupling, spin-currents of cold atoms, condensates on a ring

Abstract: The evolution of two-component cold atoms on a ring with spin–orbit coupling has been studied analytically for the case with N noninteracting particles. Then, the effect of interaction is evaluated numerically via a two-body system. Two cases are considered: (i) Starting from a ground state the evolution is induced by a sudden change of the laser field, and (ii) the evolution starting from a superposition state. Oscillating persistent spin-currents have been found. A set of formulae have been derived to describe the period and amplitude of the oscillation. Based on these formulae the oscillation can be well controlled via adjusting the parameters of the laser beams. In particular, it is predicted that movable stripes might emerge on the ring.

Key words: light-induced spin-orbit coupling, spin-currents of cold atoms, condensates on a ring

中图分类号: (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)

03.75.Kk

03.75.Mn (Multicomponent condensates; spinor condensates) 03.75.Nt (Other Bose-Einstein condensation phenomena)

解文方, 贺彦章, 鲍诚光. Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling[J]. 中国物理B, 2015, 24(6): 60305-060305.

Xie Wen-Fang (解文方), He Yan-Zhang (贺彦章), Bao Cheng-Guang (鲍诚光). Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling[J]. Chin. Phys. B, 2015, 24(6): 60305-060305.

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Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling

Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin-orbit coupling

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