Vortex coupler for atomic Bose-Einstein condensates

Details Vortex coupler for atomic Bose-Einstein condensates Vortex coupler for atomic Bose-Einstein condensates

1997-08-26

arxiv.org/abs/cond-mat/9708198v1

Phys. Rev. Lett. 79, p. 4728 (1997)

Physics

Condensed Matter

Statistical Mechanics

4 Pages, Revtex, 4 Figures

Scientific paper

10.1103/PhysRevLett.79.4728

A coherent coupler is proposed to spin a Bose-Einstein condensate composed of ultracold alkali atoms into a vortex state (VS). The proposal is based on a Raman transition induced by two copropagating $\sigma^+$ and $\sigma^-$ polarized Laguerre-Gaussian laser beams with different frequencies. We show that the transfer of angular momentum of photons to the condensed atoms through a Raman transition leads to a coherent coupling of the ground-state condensate to a rotating condensate in a VS. The detection of such a VS is discussed.

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