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The effects of optically induced non-Abelian gauge field in cold atoms | | Li-Hua Lu
; You-Quan Li
; | | Date: |
19 Jan 2007 | | Subject: | Other; Mesoscopic Systems and Quantum Hall Effect | | Abstract: | We present a general description that $N-1$ degenerate dark states can be generated by coupling $N$-fold degenerate ground states and a common excited state with $N$ laser fields. Interferences between light waves with different frequencies can produce laser fields with time-dependent amplitudes, which can induce not only U(N) non-Abelian vector fields but also the scalar ones for the adiabatic motion of atoms in such laser fields. As an example, a time-periodic gauge potential is produced by applying specific laser fields to a tripod system. Some features of the Landau levels and the ground-state phase diagram of a rotating Bose-Einstein condensate for a concrete gauge field are also discussed. | | Source: | arXiv, cond-mat/0701481 | | Services: | Forum | Review | PDF | Favorites | |
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