Quantum refrigeration cycles using spin-1/2 systems as the working substance

被引：130

作者：

He, Jizhou ^{[1
,2
]}

Chen, Jincan ^{[1
,3
]}

Hua, Ben ^{[4
]}

机构：

[1] Department of Physics, Xiamen University, Xiamen 361005, China

[2] Department of Physics, Nanchang University, Nanchang 330029, China

[3] CCAST (World Laboratory), P.O. 8730, Beijing 100080, China

[4] Chem. Engineering Research Institute, South China University of Technology, Guangzhou 510641, China

来源：

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | 2002年 / 65卷 / 03期

关键词：

Cooling - Differential equations - Hamiltonians - Integration - Magnetic moments - Mathematical models - Refrigeration;

D O I：

10.1103/PhysRevE.65.036145

中图分类号：

学科分类号：

摘要：

The cycle model of a quantum refrigerator composed of two isothermal and two isomagnetic field processes is established. The working substance in the cycle consists of many noninteracting spin-1/2 systems. The performance of the cycle is investigated, based on the quantum master equation and semigroup approach. The general expressions of several important performance parameters, such as the coefficient of performance, cooling rate, and power input, are given. Especially, the case at high temperatures is analyzed in detail. The results obtained are further generalized and discussed, so that they may be directly used to describe the performance of the quantum refrigerator using spin-J systems as the working substance. Finally, the optimum characteristics of the quantum Carnot refrigerator are derived simply. © 2002 The American Physical Society.

引用

页码：1 / 036145