有限温度下介观LC电路瞬时本征态的量子涨落(英文)  

Quantum Fluctuations of the Instantaneous Eigenstates of the Mesoscopic LC Electric Circuit at Finite Temperature

作　　者：梁麦林[1] 张治国[1] 郭俊怀[2] 

机构地区：[1]天津大学应用物理系,天津300072 [2]南开大学化学学院,天津300071

出　　处：《四川大学学报（自然科学版）》2003年第2期287-291,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：Nationalnaturalsciencefoundation(2 0 173 0 65 )

摘　　要：通过将热场动力学推广到含时体系 ,研究了有限温度下介观含时LC电路中的量子涨落 .虽然温度的升高会使量子涨落增加 ,但电容和电感等物理量的时间变化却能使涨落减小 .电源的存在会对电荷和磁通量的平均值有贡献 ,但不会影响量子涨落 .当电路中有电源时 ,电荷和磁通量的平均值会依赖于温度 ;而当电路中没有电源时 ,各平均值为零 。By extending the thermal field dynamics to the time dependent system, quantum fluctuations of the time dependent mesoscopic LC electric circuit at finite temperature were studied. While the up going temperature will increase the quantum fluctuations, time changes of the physical quantities such as the inductance and capacitance can suppress the quantum fluctuations. The electric source will not affect the quantum fluctuations, but will contribute to the averages of the charge and magnetic flux. It was also found that if there is a source, the averages will depend on the temperature; if there is no source, the averages will be zero and so temperature independent.

关 键 词：介观LC电路 有限温度 量子涨落 瞬时本征态 热场动力学 电荷 磁通量 

分 类 号：TN201[电子电信—物理电子学]