2007/01/31 by Li-Hua Lu, Li-Hua Lü, You‐Quan Li +1 · 33 citations
Computer Science · Physics and Astronomy · #Adiabatic process #Amplitude #Cold Atom Physics and Bose-Einstein Condensates #Degenerate energy levels #Excited state #Ground state #Laser #Physics #Quantum Information and Cryptography #Quantum electrodynamics #Quantum mechanics #Quantum optics and atomic interactions #Scalar field #cond-mat.mes-hall #cond-mat.other
paper · pdf · doi:10.1103/physreva.76.023410
published in Physical Review A 76(2) (American Physical Society) · Revtex 6 pages, 2 figures, version to be published in PRA
arxiv created 2007/07/04 · openalex publication_date 2007/08/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that N\ensuremath-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.