Extended JC-Dicke model for a two-component atomic BEC inside a cavity

Details Extended JC-Dicke model for a two-component atomic BEC inside a cavity Extended JC-Dicke model for a two-component atomic BEC inside a cavity

2009-04-30

arxiv.org/abs/0904.4730v2

Physics

Quantum Physics

6 pages, 6 figures

Scientific paper

We consider a trapped two-component atomic Bose-Einstein condensate (BEC), where each atom with three energy-levels is coupled to an optical cavity field and an external classical optical field as well as a microwave field to form the so-called $\Delta$-type configuration. After adiabatically eliminating the atomic excited state, an extended JC-Dicke model is derived under the rotating-wave approximation. The scaled ground-state energy and the phase diagram of this model Hamiltonian are investigated in the framework of mean-field approach. A new phase transition is revealed when the amplitude of microwave field changes its sign.

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