Parametric optimum design of an irreversible spin quantum refrigeration cycle

作     者：林比宏 陈金灿 

作者机构：DepartmentofPhyslcsXiamenUniversityXiamen361005China//DepartmentofPhysicsQuanzhouNormalCollegeQuanzhou362000China DepartmentofPhysicsXiamenUniversityXiamen361005China 

基　　金：Project supported jointly by the Key Project Foundation of Science and Technology Research of Ministry of Education of China and by the Science and Technology Programme (Grant No JA03153) of Fujian's Education Department of China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2005年第14卷第2期

页      码：293-300页

摘      要：The general performance characteristics of an irreversible quantum refrigeration cycle using many non-interacting spin-1/2 systems as the working substance and consisting of two adiabatic and two isomagnetic field processes are investigated, based on the quantum master equation and semi-group approach. Expressions for several important performance parameters such as the coefficient of performance, cooling rate and power input are derived. By using numerical solutions, the cooling rate of the refrigeration cycle subject to the finite cycle duration is optimized. The maximum cooling rate and the corresponding parameters are calculated numerically. The optimal region of the coefficient of performance and the optimal ranges of the temperatures of the working substance and the times spent on the two isomagnetic field processes are determined. Moreover, the optimal performance of the cycle in the high-temperature limit is also analysed in detail. The results obtained here are further generalized, so that they may be directly used to describe the performance of the quantum refrigeration cycle using spin-J systems as the working substance.

主 题 词：quantum refrigeration cycles quantum master equation parametric optimum design 

学科分类：080701[080701] 07[理学] 08[工学] 0807[工学-电子信息类] 070201[070201] 0702[理学-物理学类] 

核心收录：

馆 藏 号：203177677...