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Excitation spectrum of spin-1 bosonic atoms in an optical lattice with high filling factors

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分类：O413.3[理学—理论物理;理学—物理]
作者机构：[1]Department of Physics, Southeast University, Nanjing 211189, China
相关基金：The project supported by National Natural Science Foundation of China under Grant Nos. 10547107 and 10571091
相关项目：杨-巴克斯特方程及其相关问题

关键词：自旋1粒子, 冷玻色原子, 光栅, 激发谱, 旋量原子, 填充因子, excitation spectrum, optical lattices, spinor atoms

中文摘要：

格林“ s 功能和在一个光格子的 spin-1cold 原子的高顺序的 correiation 功能被定义。因为我们与高充满因素在一个光格子考虑 spin-1 Bosecondensed 原子的问题，即， Bosecondensed 原子 n_0 的数字密度大，他们的变化能被忽视，我们拿 mean-fieldapproximation 高顺序的术语。为极的盒子和铁磁性的盒子的刺激系列被获得并且分析。

英文摘要：

The Green＇s function and the higher-order correlation functions of spin-1 cold atoms in an optical lattice are defined. Because we consider the problem of spin-1 Bose condensed atoms in an optical lattice with high filling factors, i.e., the number density of Bose condensed atoms no is large, the fluctuation of them can be neglected and we take mean-field approximation for the higher-order terms. The excitation spectra for both the polar case and the ferromagnetic case are obtained and analyzed.

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