Performance of a quantum heat engine cycle working with harmonic oscillator systems  

作　　者：WANG JianHui HE JiZhou MAO ZhiYuan 

机构地区：[1]Department of Physics,Nanchang University,Nanchang 330047,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2007年第2期163-176,共14页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Science Foundation of China(Grant No. 10465003) ;the Natural Science Foundation of Jiangxi Province(Grant No. 0412011)

摘　　要：A cycle model of an irreversible heat engine working with harmonic systems is established in this paper. Based on the equation of motion of an operator in the Heisenberg picture and semi-group approach, the first law of thermodynamics for a harmonic system and the time evolution of the system are obtained. The general expressions for several important parameters, such as the work, efficiency, power output, and rate of entropy production are derived. By means of numerical analysis, the optimally operating regions and the optimal values of performance parameters of the cycle are determined under the condition of maximum power output. At last, some special cases, such as high temperature limit and frictionless case, are dis-cussed in brief.A cycle model of an irreversible heat engine working with harmonic systems is established in this paper. Based on the equation of motion of an operator in the Heisenberg picture and semi-group approach, the first law of thermodynamics for a harmonic system and the time evolution of the system are obtained. The general expressions for several important parameters, such as the work, efficiency, power output, and rate of entropy production are derived. By means of numerical analysis, the optimally operating regions and the optimal values of performance parameters of the cycle are determined under the condition of maximum power output. At last, some special cases, such as high temperature limit and frictionless case, are discussed in brief.

关 键 词：HARMONIC systems heat engine CYCLE IRREVERSIBLE THERMODYNAMICS PERFORMANCE optimization 

分 类 号：TN752[电子电信—电路与系统]