借助集团展开的超辐射热力学  

THERMODYNAMICS OF A SUPERRADIANCE WITH A CLUSTER EXPANSION

作　　者：刘文森[1,2] 李秀平[1,2] 张云波 梁九卿[1,2] 

机构地区：[1]山西大学物理系 [2]中国科学院物理研究所

出　　处：《物理学报》1998年第3期368-381,共14页Acta Physica Sinica

基　　金：国家自然科学基金;山西省自然科学基金

摘　　要：Ｎ原子单模辐射场相互作用系统当作相互作用准玻色子光子系统并处理作巨正则系综．系统热力学势的明显表达式应用集团展开得到，某些热力学量按通常的热力学公式导出．数值计算和图示表明了这个超辐射系统的热力学行为，在超辐射态临界线上和其他地方出现的奇异性揭示了在此合作系统中存在第二类相变换．Abstract N atom single mode radiation field interaction system is regarded as an interacting quasi boson photon system and is treated as a grand canonical ensemble.The explicit expression for the thermodynamical potential of the system is obtained using cluster expansion method.Some thermodynamic quantities are derived in terms of the general thermodynamic formulas.The numerical calculation and diagrams exhibit the thermodynamic behavior of the system.The singularities appearing in the critical line and other places furnish evidences of existence of the second kind of phase transformation in this collective system.

关 键 词：N原子辐射场 集团展开 超辐射 热力学势 

分 类 号：O414[理学—理论物理] O562.2[理学—物理]