Phys. Rev. Lett. 79, 4728–4731 (1997)Vortex Coupler for Atomic Bose-Einstein CondensatesReceived 26 August 1997; published in the issue dated 15 December 1997 A coherent coupler is proposed to spin a Bose-Einstein condensate composed of ultracold alkali atoms into a vortex state. The proposal is based on a Raman transition induced by two copropagating σ+ and σ- 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 vortex state. The detection of such a vortex state is discussed. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.4728
DOI:
10.1103/PhysRevLett.79.4728
PACS:
03.75.Fi, 32.80.Lg
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