Effective Bose-Hubbard interaction with enhanced nonlinearity in an array of coupled cavities

• 来源期刊: 中国物理B(英文版)
• 学科: 物理学
• 关键词: 强非线性 耦合谐振器 阵列 Hubbard模型 有效哈密顿量 玻色 原子相互作用 四能级原子
• 年，卷（期）: 2011,（7）
• 页码范围: 074205.1-072405.7
• 页数: -1798页
• 分类号: O322
• 语种: 英文
• DOI: 10.1088/1674-1056/20/7/074205

摘要

An array of coupled cavities,each of which contains an N four-level atom,is investigated.When cavity fields dispersively interact with the atoms,an effective Bose-Hubbard model can be achieved.By numerically comparing the full Hamiltonian with the effective one,we find that within the parameters region,the effective Hamiltonian can completely account for the Mott-insulator as well as the phase transition from the similar Mott-insulator to superfluid.Through jointly adjusting the classical Rabi frequency and...