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

2014/04/18 by Wenfang Xie, Wen-Fang Xie, Xie, Wen-Fang +2 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum optics and atomic interactions #Strong Light-Matter Interactions #cond-mat.mes-hall

paper · pdf · doi:10.48550/arxiv.1404.4710

11 pages, 6 figures

arxiv created 2014/06/03 · arxiv updated 2014/06/04

Abstract

The evolution of two-component cold atoms on a ring with quasispin-orbit (qSO) coupling and spin-flip has been studied analytically (for arbitrary particle number N without interaction) and numerically (for a few-body system with interaction). Counter-propagating and oscillating persistent spin-currents have been found. The regularity governing the period and amplitude of oscillation has been clarified. When the strengths for the qSO coupling and spin-flip are fixed, the frequency of oscillation can be effectively tuned by the Raman detuning, while the amplitude can be tuned by either changing the initial status and/or the Raman detuning. When the initial numbers of atoms of the two-components N₁ and N₂ are close to each other, the oscillation will be seriously suppressed. The condition for maximizing the amplitude of oscillation is given.

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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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