One-dimensional Bose gas in optical lattices of arbitrary strength

One-dimensional Bose gas in optical lattices of arbitrary strength
复制标题

任意强度光学晶格中的一维玻色气体

DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
F. Mazzanti
F. Mazzanti
中科院分区：
--
文献类型：
--
作者：
G. Astrakharchik;K. Krutitsky;M. Lewenstein;F. Mazzanti

文献摘要

被引文献

相似文献

利用精确扩散蒙特卡罗方法研究了零温下光学晶格中具有接触相互作用的一维玻色气体。将基本连续模型获得的结果与使用精确对角化的晶格（离散）玻色-哈伯德模型和量子sine-Gordon模型获得的结果进行比较。我们绘制出完整的连续模型的相图，并确定区域的Bose-Hubbard模型的适用性。计算了表征系统的各种物理量，并证明了sine-Gordon模型用于浅晶格是不准确的。
One-dimensional Bose gas with contact interaction in optical lattices at zero temperature is investigated by means of the exact diffusion Monte Carlo algorithm. The results obtained from the fundamental continuous model are compared with those obtained from the lattice (discrete) Bose-Hubbard model, using exact diagonalization, and from the quantum sine-Gordon model. We map out the complete phase diagram of the continuous model and determine the regions of applicability of the Bose-Hubbard model. Various physical quantities characterizing the systems are calculated, and it is demonstrated that the sine-Gordon model used for shallow lattices is inaccurate.