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

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.

Keywords: light-induced spin-orbit coupling spin-currents of cold atoms condensates on a ring

Received: 06 November 2014
Revised: 16 January 2015
Accepted manuscript online:

PACS:	03.75.Kk	(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
	03.75.Mn	(Multicomponent condensates; spinor condensates)
	03.75.Nt	(Other Bose-Einstein condensation phenomena)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10874249).

Corresponding Authors: Bao Cheng-Guang
E-mail: stsbcg@mail.sysu.edu.cn

About author: 03.75.Kk; 03.75.Mn; 03.75.Nt

Cite this article:

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 2015 Chin. Phys. B 24 060305

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

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