Quantum heat engine cycle working with a strongly correlated electron system

查看全文 作　　者：WANG [2]HaiLong;PAN [1,2]Hui;WANG [1,2]RongMing

机构地区：[1]Department of Physics and State Key Laboratory of Software Development Environment,Beijing University of Aeronautics and Astronautics,Beijing 100191,China;[2]Key Laboratory of Micro-nano Measurement-Manipulation and Physics(Ministry of Education)and Department of Physics,Beijing University of Aeronautics and Astronautics,Beijing 100191,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2012年第55卷第5期,共6页

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.50971011,11174022 and 10974011);the Beijing Natural Science Foundation (Grant No.1102025);the State Key Laboratory of Software Development Environment (Grant No.SKLSDE-2011ZX-19);the Research Fund for the Doctoral Program of Higher Education of China(Grant No.20091102110038) 摘　　要：A new model of a quantum heat engine(QHE) cycle is established,in which the working substance consists of an interacting electrons system.One of our purposes is to test the validity of the second law of thermodynamics by this model,which is more general than the spin-1/2 antiferromagnetic Heisenberg model since it would recover the spin model when the on-site Coulomb interaction U is strong enough.On the basis of quantum mechanics and the first law of thermodynamics,we show no violation of the second law of thermodynamics during the cycle.We further study the performance characteristics of the cycle by investigating in detail the optimal relations of efficiency and dimensionless power output.We find that the efficiency of our engine can be expressed as η = 1 - t22/t12 in the large-U limit,which is valid even for a four sites QHE. 关键词：强关联电子系统量子力学热机循环 HEISENBERG模型热力学第二定律库仑相互作用热力学第一定律自旋模型

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Quantum heat engine cycle working with a strongly correlated electron system

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