低温下自旋玻色子模型中的热输运：多层多组态含时哈特里研究

Heat Transport in a Spin-Boson Model at Low Temperatures: A Multilayer Multiconfiguration Time-Dependent Hartree Study.

作者信息

Yang Chou-Hsun, Wang Haobin

机构信息

Department of Chemistry, University of Colorado Denver, Denver, CO 80217-3364, USA.

出版信息

Entropy (Basel). 2020 Sep 29;22(10):1099. doi: 10.3390/e22101099.

DOI:10.3390/e22101099

PMID:33286870

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7597201/

Abstract

Extending our previous work, quantum dynamic simulations are performed to study low temperature heat transport in a spin-boson model where a two-level subsystem is coupled to two independent harmonic baths. Multilayer multiconfiguration time-dependent Hartree theory is used to numerically evaluate the thermal flux, for which the bath is represented by hundreds to thousands of modes. The simulation results are compared with the approximate Redfield theory approach, and the physics is analyzed versus different physical parameters.

摘要

扩展我们之前的工作，进行了量子动力学模拟，以研究自旋玻色子模型中的低温热输运，其中一个两能级子系统与两个独立的谐振子浴耦合。使用多层多组态含时哈特里理论对热流进行数值评估，其中浴由数百到数千个模式表示。将模拟结果与近似的雷德菲尔德理论方法进行比较，并针对不同物理参数分析其物理特性。