期刊
PHYSICAL REVIEW A
卷 78, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.78.043603
关键词
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资金
- NCET
- NSF of China [10574014, 10774095]
- Shanxi Province Youth Science Foundation [20051001]
- ROCS [2006CB921102]
In this paper, the quantum phase transition between the superfluid state and the Mott-insulator state is studied based on an extended Bose-Hubbard model with two- and three-body on-site interactions. By employing the mean-field approximation we find the extension of the insulating lobes and the existence of a fixed point in three-dimensional phase space. We investigate the link between experimental parameters and theoretical variables. The possibility to observe our results through some experimental effects in optically trapped Bose-Einstein condensates is also discussed.
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