基于三个耦合量子点的四端混合驱动制冷机  

Four-terminal hybrid driven refrigerator based on three coupled quantum dots

作　　者：刘行 徐帅 高金柱 何济洲[1] Liu Xing;Xu Shuai;Gao Jin-Zhu;He Ji-Zhou(Department of Physics,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学物理系,南昌330031

出　　处：《物理学报》2022年第19期29-38,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11875034)资助的课题。

摘　　要：本文提出了一种具有三个电容耦合量子点的四端混合驱动制冷机模型,该模型可以通过最高温的热库注入的热能和偏置电压输入的功率共同驱动来实现对低温库的制冷.基于主方程理论,分别导出了弱电容耦合和强电容耦合情况下三个量子点与四个库之间的电荷流和热流的表达式.数值模拟了制冷率与制冷系数之间的热力学性能特征曲线,在最大制冷率条件下对制冷机的主要性能参数进行了优化.最后,比较了该制冷机在强电容耦合和弱电容耦合情况下的性能.In this paper,a four-terminal hybrid driven refrigerator model with three capacitively coupled quantum dots is proposed,which can be driven by the energy current injected from the highest temperature thermal reservoir and the power input to achieve the refrigeration of the low temperature reservoir.Based on the master equation we derive the expressions for charge current and heat current between three quantum dots and thermal reservoirs in the weak/strong capacitive coupling case,respectively.We numerically analyze the thermodynamic performance characteristics of the refrigerator between the cooling rate and the coefficient of performance,and the main performance parameters of the refrigerator are optimized under the condition of the maximum cooling rate.Finally,we compare the performance of this refrigerator in the strong capacitive coupling case with that in the weak capacitive coupling case.

关 键 词：耦合量子点 四端混合驱动制冷机 制冷率 制冷系数 

分 类 号：TB651[一般工业技术—制冷工程]