Heat transfer in a nonequilibrium spin-boson model: A perturbative approach

被引：6
作者：
Wu, Wei [1 ,2 ]
Zhu, Wen-Li [1 ]
机构：
[1] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China
[2] Beijing Computat Sci Res Ctr, Beijing 100193, Peoples R China
来源：
ANNALS OF PHYSICS | 2020年 / 418卷
基金：
中国博士后科学基金;
关键词：
Heat transport; Spin-boson model; Nonequilibrium system; 2-LEVEL SYSTEM; ENERGY-TRANSPORT; DYNAMICS; BATH;
D O I：
10.1016/j.aop.2020.168203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the heat transport in a nonequilibrium spin-boson model, where a two-level system bridging two harmonic reservoirs at different temperatures, by employing a unitary transformation along with a resolvent operator expansion technique. Analytical expressions of the heat current and the thermal conductance of this model are obtained. Compared with the performances of other methods, namely, the nonequilibrium Green's function method and the equation of motion formulation, our approach provides a reasonable description of heat transfer properties of the nonequilibrium spin-boson model for the weak-coupling region at low temperature. (C) 2020 Elsevier Inc. All rights reserved.
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页数：14
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