arXiv 0806.38402008-06-24cond-mat.other

Spin-vortex nucleation in a Bose-Einstein condensate by a spin-dependent rotating trap

Hiroki Chiba, Hiroki Saito

备注：: 6 pages, 3 figures
发表信息：: Phys. Rev. A 78, 043602 (2008)
DOI：: 10.1103/PhysRevA.78.043602

英文摘要：

A method to produce a spin-dependent rotating potential using near-resonant circularly polarized laser beams is proposed. It is shown that half-quantum vortices are nucleated in a spinor Bose-Einstein condensate with an antiferromagnetic interaction. In contrast to the vortex nucleation in a scalar BEC, the spin-vortex nucleation occurs at a low rotation frequency ($\simeq 0.1 ω_\perp$ with $ω_\perp$ being the radial trap frequency) in a short nucleation time $\simeq 50$ ms without dissipation. A method for nondestructive measurement of half-quantum vortices is discussed.

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