Coherent states and quantum oscillations of BEC-BCS systems |
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Authors: | H.B. Huang C.X. Yang L.J. Sun L. Chen J. Li |
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Affiliation: | Department of Physics, Southeast University, Nanjing 210096, China |
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Abstract: | We show by using the mean-field approximation that the states of composite Fermi-Bose superfluids created in cold-atom traps via a Feshbach resonance at zero temperature are generalized SU(2)⊗SU(1,1) coherent states. In response to a sudden change of the interaction between fermionic atoms and bosonic molecules, a Cooper pair can exhibit collapse and revival quantum behaviors for an initial generalized coherent state of molecules, and Rabi oscillation for a vacuum molecular state. Occurrence of the collapse and revival phenomenon is thus the manifestation of the formation of the Bose-Einstein condensate. |
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Keywords: | 03.75.Ss 03.75.Kk 03.75.Nt |
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