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Heat Modulation on Target Thermal Bath via Coherent Auxiliary Bath

Authors :
Wen-Li Yu
Tao Li
Hai Li
Yun Zhang
Jian Zou
Ying-Dan Wang
Source :
Entropy, Vol 23, Iss 9, p 1183 (2021)
Publication Year :
2021
Publisher :
MDPI AG, 2021.

Abstract

We study a scheme of thermal management where a three-qubit system assisted with a coherent auxiliary bath (CAB) is employed to implement heat management on a target thermal bath (TTB). We consider the CAB/TTB being ensemble of coherent/thermal two-level atoms (TLAs), and within the framework of collision model investigate the characteristics of steady heat current (also called target heat current (THC)) between the system and the TTB. It demonstrates that with the help of the quantum coherence of ancillae the magnitude and direction of heat current can be controlled only by adjusting the coupling strength of system-CAB. Meanwhile, we also show that the influences of quantum coherence of ancillae on the heat current strongly depend on the coupling strength of system—CAB, and the THC becomes positively/negatively correlated with the coherence magnitude of ancillae when the coupling strength below/over some critical value. Besides, the system with the CAB could serve as a multifunctional device integrating the thermal functions of heat amplifier, suppressor, switcher and refrigerator, while with thermal auxiliary bath it can only work as a thermal suppressor. Our work provides a new perspective for the design of multifunctional thermal device utilizing the resource of quantum coherence from the CAB.

Details

Language :
English
ISSN :
10994300
Volume :
23
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Entropy
Publication Type :
Academic Journal
Accession number :
edsdoj.20dbe8893a467c980374b63ddd79f4
Document Type :
article
Full Text :
https://doi.org/10.3390/e23091183