Thermodynamics of strongly interacting fermions in two-dimensional optical lattices
Thermodynamics of strongly interacting fermions in two-dimensional optical lattices
复制标题
二维光学晶格中强相互作用费米子的热力学
DOI：
10.1103/physreva.84.053611
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发表时间：
2011
影响因子：
2.9
通讯作者：
M. Rigol
中科院分区：
文献类型：
--
作者：
E. Khatami;M. Rigol
我们研究了二维光学晶格中强关联费米子的有限温度性质，这是一种可以在热力学极限下得到精确结果的计算技术。我们的分析集中在强相互作用区，其中位斥力是带宽的数量级或更大。我们计算了与当前光学晶格实验相似或更低的温度下的物态方程、双占据度、熵、均匀磁化率和自旋关联。我们从平坦化囚禁势和增加相互作用强度两方面对二维囚禁费米子的绝热冷却进行了定量的分析。
We study finite-temperature properties of strongly correlated fermions in two-dimensional optical lattices by means of numerical linked cluster expansions, a computational technique that allows one to obtain exact results in the thermodynamic limit. We focus our analysis on the strongly interacting regime, where the on-site repulsion is of the order of or greater than the band width. We compute the equation of state, double occupancy, entropy, uniform susceptibility, and spin correlations for temperatures that are similar to or below the ones achieved in current optical lattice experiments. We provide a quantitative analysis of adiabatic cooling of trapped fermions in two dimensions, by means of both flattening the trapping potential and increasing the interaction strength.