Improved Variational Approach to the Two-Site Bose-Hubbard Model

被引：0
|
作者：
M. Melé-Messeguer
B. Juliá-Díaz
A. Polls
机构：
[1] Universitat de Barcelona,Departament d’Estructura i Constituents de la Matèria
[2] Universitat de Barcelona,Institut de Ciències del Cosmos
[3] ICFO—Institut de Ciències Fotòniques,undefined
来源：
Journal of Low Temperature Physics | 2011年 / 165卷
关键词：
Tunneling; Josephson effect; Bose-Einstein condensates;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An improved variational ansatz is proposed to capture the most striking properties of the ground state of a slightly biased attractive two-site Bose-Hubbard Hamiltonian. Our ansatz, albeit its simplicity, is found to capture well the exact properties of the ground state for a wide variety of model parameters, in particular the fragmentation occurring before the formation of cat-like states and also the formation of strongly correlated cat-like states.
引用
收藏
页码：180 / 194
页数：14
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