摘要
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.
作者
王彬
陈艳
WANG Bin;CHEN Yan(Institute of Theoretical Physics,Lanzhou University,Lanzhou 730070;Department of Physical Science and Electronic Technology,Hexi University,Zhangye 734000)
基金
Supported by the National Natural Science Foundation of China under Grants No 10704031
the Basic Scientific Research Business Expenses of the Central University under Grant No lzujbky-2010-75
the Open Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University(No LZUMMM2012013).