Entanglement Hamiltonian of Interacting Fermionic Models.

Entanglement Hamiltonian of Interacting Fermionic Models.
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相互作用费米子模型的纠缠哈密顿量。

DOI:
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发表时间:
2018
影响因子:
8.6
通讯作者:
F. Assaad
F. Assaad
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
F. Parisen Toldin;F. Assaad

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强关联电子系统数值计算的最新进展使得相互作用费米子系统的纠缠谱和熵的计算成为可能。纠缠(模)哈密顿量的显式确定已被证明是一个相当困难的问题,只有少数结果。介绍了一种利用辅助场量子蒙特卡罗模拟直接确定相互作用费米子模型纠缠哈密顿量的方法。我们实现我们的方法上的一维哈伯德链划分成两个部分和哈伯德两条腿的阶梯划分成两个链。在这两种情况下,我们研究的纠缠哈密顿量的物理温度的函数的演变。
Recent numerical advances in the field of strongly correlated electron systems allow the calculation of the entanglement spectrum and entropies for interacting fermionic systems. An explicit determination of the entanglement (modular) Hamiltonian has proven to be a considerably more difficult problem, and only a few results are available. We introduce a technique to directly determine the entanglement Hamiltonian of interacting fermionic models by means of auxiliary field quantum Monte Carlo simulations. We implement our method on the one-dimensional Hubbard chain partitioned into two segments and on the Hubbard two-leg ladder partitioned into two chains. In both cases, we study the evolution of the entanglement Hamiltonian as a function of the physical temperature.
来自行列式量子蒙特卡罗模拟的相互作用费米子的 Rényi 熵
DOI: 10.1088/1742-5468/2014/08/p08015
发表时间: 2014
期刊: Journal of Statistical Mechanics: Theory and Experiment
影响因子: --
作者:
P. Broecker;S. Trebst
通讯作者: S. Trebst