论文标题
从确定性量子蒙特卡洛的扩展哈伯德模型中金属 - 绝缘体过渡的热力学
Thermodynamics of the metal-insulator transition in the extended Hubbard model from determinantal quantum Monte Carlo
论文作者
论文摘要
使用有限温度的确定性量子蒙特卡洛模拟，我们检查了在中间耦合的Slater型中的半填充方晶格上扩展哈伯德模型的热力学特性。我们考虑了最近邻居相互作用的情况和远程库仑相互作用，对于耦合强度，非局部相互作用的存在仍然使我们能够执行符号 - 问题无量子量子蒙特卡洛模拟。特别是，我们根据这种相互作用方案中的一阶金属 - 绝缘体跃迁来评估最近提出的方案。
Using finite-temperature determinantal quantum Monte Carlo simulations, we examine the thermodynamic properties of the extended Hubbard model on the half-filled square lattice in the Slater regime at intermediate coupling. We consider both the case of nearest-neighbor interactions and long-range Coulomb interactions, for coupling strengths in which the presence of non-local interactions still allows us to perform sign-problem free quantum Monte Carlo simulations. In particular, we assess a recently proposed scenario from variational calculations in terms of a first-order metal-insulator transition in this interaction regime.
