Band Structure of Bose-Einstein Condensates in a Cavity-Mediated Triple-Well System
WANG Bin1** , CHEN Yan2
1 Institute of Theoretical Physics, Lanzhou University, Lanzhou 7300702 Department of Physical Science and Electronic Technology, Hexi University, Zhangye 734000
Abstract ：We investigate the band structure and the dynamics of Bose-Einstein condensates in a triple-well trap, which are located in a high-finesse optical cavity. For the noninteracting atoms, the band structure of the eigenenergies are obtained using the numerical methods under the mean-field approximation. It is demonstrated that the energy band structure is strongly dependent on the value of reduced cavity detuning. Under some conditions, the atomic band structure develops loop structures and swallowtail structure, which mean the atom-cavity system exhibits bistability. We attribute the appearance of new states to the nonlinearity of the cavity-field-induced tilt. For the interacting atoms, the structure of the eigenenergy band appears more complicated for the interaction between atoms.
收稿日期: 2012-12-09
出版日期: 2013-03-02
:
42.50.Pq
(Cavity quantum electrodynamics; micromasers)
71.20.-b
(Electron density of states and band structure of crystalline solids)
05.45.-a
(Nonlinear dynamics and chaos)
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2013, Vol. 30 
