Extended dissipaton equation of motion for electronic open quantum systems: Application to the Kondo impurity model

In this paper, we present an extended dissipaton equation of motion for studying the dynamics of electronic impurity systems. Compared with the original theoretical formalism, the quadratic couplings are introduced into the Hamiltonian accounting for the interaction between the impurity and its surr...

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Published in:The Journal of chemical physics 2023-07, Vol.159 (2)
Main Authors: Su, Yu, Chen, Zi-Hao, Wang, Yao, Zheng, Xiao, Xu, Rui-Xue, Yan, YiJing
Format: Article
Language:English
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Couplings
Dissipation
Equations of motion
Hamiltonian functions
Impurities
Temperature dependence
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Zheng, Xiao
Xu, Rui-Xue
Yan, YiJing
description In this paper, we present an extended dissipaton equation of motion for studying the dynamics of electronic impurity systems. Compared with the original theoretical formalism, the quadratic couplings are introduced into the Hamiltonian accounting for the interaction between the impurity and its surrounding environment. By exploiting the quadratic fermionic dissipaton algebra, the proposed extended dissipaton equation of motion offers a powerful tool for studying the dynamical behaviors of electronic impurity systems, particularly in situations where nonequilibrium and strongly correlated effects play significant roles. Numerical demonstrations are carried out to investigate the temperature dependence of the Kondo resonance in the Kondo impurity model.
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subjects Couplings
Dissipation
Equations of motion
Hamiltonian functions
Impurities
Temperature dependence
title Extended dissipaton equation of motion for electronic open quantum systems: Application to the Kondo impurity model
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