标题： 有限温度下Lieb-Liniger模型的单粒子格林函数 显示英文标题

标题： Finite temperature single-particle Green's function in the Lieb-Liniger model

摘要： 我们开发了一种蒙特卡罗采样算法，以数值评估排斥型Lieb-Liniger模型中有限温度单粒子格林函数的Lehmann表示。 这使我们能够在整个温度和相互作用范围内以及广义吉布斯系综中确定谱函数。 我们将结果与无限相互作用强度的已知极限进行对比，发现有很好的一致性。 显示英文摘要

摘要： We develop a Monte Carlo sampling algorithm to numerically evaluate the Lehmann representation for the finite temperature single-particle Green's function in the repulsive Lieb-Liniger model. This allows us to determine the spectral function in the full range of temperatures and interactions, as well as in generalized Gibbs ensembles. We test our results against the known limit of infinite interaction strength and find excellent agreement.