Spin-Orbit Coupled Spinor Bose-Einstein Condensates

Details Spin-Orbit Coupled Spinor Bose-Einstein Condensates Spin-Orbit Coupled Spinor Bose-Einstein Condensates

2010-06-26

arxiv.org/abs/1006.5148v4

Physical Review Letters, 105, 160403 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.105.160403

An effective spin-orbit coupling can be generated in cold atom system by engineering atom-light interactions. In this letter we study spin-1/2 and spin-1 Bose-Einstein condensates with Rashba spin-orbit coupling, and find that the condensate wave function will develop non-trivial structures. From numerical simulation we have identified two different phases. In one phase the ground state is a single plane wave, and often we find the system splits into domains and an array of vortices plays the role as domain wall. In this phase, time-reversal symmetry is broken. In the other phase the condensate wave function is a standing wave and it forms spin stripe. The transition between them is driven by interactions between bosons. We also provide an analytical understanding of these results and determines the transition point between the two phases.

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