The Third Law of Quantum Thermodynamics in the Presence of Anomalous Couplings  

作　　者：王春阳 包景东 

机构地区：[1]Department of Physics, Beijing Normal University, Beijing 100875

出　　处：《Chinese Physics Letters》2008年第2期429-432,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 1067401, and the Specialized Research Foundation for the Doctoral Program of Higher Education under Grant No 20050027001.

摘　　要：The quantum thermodynamic functions of a harmonic oscillator coupled to a heat bath through velocity-dependent coupling are obtained analytically. It is shown that both the free energy and the entropy decay fast with the temperature in relation to that of the usual coupling from. This implies that the velocity-dependent coupling helps to ensure the third law of thermodynamics.The quantum thermodynamic functions of a harmonic oscillator coupled to a heat bath through velocity-dependent coupling are obtained analytically. It is shown that both the free energy and the entropy decay fast with the temperature in relation to that of the usual coupling from. This implies that the velocity-dependent coupling helps to ensure the third law of thermodynamics.

关 键 词：BROWNIAN-MOTION HEAT BATH LANGEVIN EQUATION MAGNETIC-FIELD OSCILLATOR DISSIPATION PARTICLE 

分 类 号：O413[理学—理论物理]