弱磁场中弱相互作用费米气体的热力学性质  

Thermodynamic properties of a weakly interacting Fermi gas in weak magnetic field

作　　者：门福殿[1] 

机构地区：[1]中国石油大学(华东)物理科学与技术学院,东营257061

出　　处：《物理学报》2006年第4期1622-1627,共6页Acta Physica Sinica

摘　　要：根据赝势法和系综理论导出弱磁场中弱相互作用费米气体的内能、化学势和热容量的小参数r的解析式.在此基础上给出高温和低温两种情况下弱磁场中弱相互作用费米气体的热力学性质,探讨磁场及粒子间相互作用对热力学性质的影响,分析磁场与三维谐振势两种约束对系统性质影响的不同及其原因.The analytical expressions of internal energy, chemical potential and heat capacity of the little parameter r for a weakly interacting Fermi gas in weak magnetic field are derived by using ＂pseudopotential＂ method and ensemble theory. Based on the derived expressions, the thermodynamic properties of a weakly interacting Fermi gas in weak magnetic field at both high and low temperatures are given. The effects of magnetic field and interparticle interactions on the thermodynamic properties are discussed. The difference in the effects of magnetic trap and three-dimensional harmonic trap on the properties of the system and their reasons are analyzed.

关 键 词：赝势法 费米气体 相互作用 热力学性质 

分 类 号：O572.243[理学—粒子物理与原子核物理]