Currents and Green's functions of impurities out of equilibrium: Results from inchworm quantum Monte Carlo

被引：41
|
作者：
Antipov, Andrey E. [1 ]
Dong, Qiaoyuan [1 ]
Kleinhenz, Joseph [1 ]
Cohen, Guy [2 ]
Gull, Emanuel [1 ]
机构：
[1] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[2] Tel Aviv Univ, Sch Chem, IL-69978 Tel Aviv, Israel
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 08期
基金：
以色列科学基金会;
关键词：
ANDERSON MODEL; TRANSPORT; STATES;
D O I：
10.1103/PhysRevB.95.085144
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We generalize the recently developed inchworm quantum Monte Carlo method to the full Keldysh contour with forward, backward, and equilibrium branches to describe the dynamics of strongly correlated impurity problems with time-dependent parameters. We introduce a method to compute Green's functions, spectral functions, and currents for inchworm Monte Carlo and show how systematic error assessments in real time can be obtained. We then illustrate the capabilities of the algorithm with a study of the behavior of quantum impurities after an instantaneous voltage quench from a thermal equilibrium state.
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页数：10
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