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Non-Abelian gauge potentials for ultracold atoms with degenerate dark states | J Ruseckas
; G Juzeliƫnas
; P Ohberg
; M Fleischhauer
; | Date: |
1 Jul 2005 | Journal: | Phys Rev Lett, 95 (1), 010404 | Abstract: | We show that the adiabatic motion of ultracold, multilevel atoms in spatially varying laser fields can give rise to effective non-Abelian gauge fields if degenerate adiabatic eigenstates of the atom-laser interaction exist. A pair of such degenerate dark states emerges, e.g., if laser fields couple three internal states of an atom to a fourth common one under pairwise two-photon-resonance conditions. For this so-called tripod scheme we derive general conditions for truly non-Abelian gauge potentials and discuss special examples. In particular we show that using orthogonal laser beams with orbital angular momentum an effective magnetic field can be generated that has a monopole component. | Source: | PubMed, pmid16090590 | Services: | Forum | Review | Favorites |
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