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

  • Quantum Optics
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Abstract

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 Δ-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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Authors and Affiliations

  1. Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China

    Y. Li & Z. D. Wang

  2. ERATO, JST, Macroscopic Quantum Control Project, Hongo, Bunkyo-Ku, 113-8656, Tokyo, Japan

    P. Zhang

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  1. Y. Li
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  2. P. Zhang
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  3. Z. D. Wang
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Correspondence to Y. Li.

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Li, Y., Zhang, P. & Wang, Z. Extended JC-Dicke model for two-component atomic BEC inside a cavity. Eur. Phys. J. D 58, 379–384 (2010). https://doi.org/10.1140/epjd/e2010-00126-4

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  • DOI: https://doi.org/10.1140/epjd/e2010-00126-4

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