有限温度下介观电容耦合电路中的量子涨落  

Quantum fluctuations in capacitive coupled electric circuits at finite temperature

作　　者：梁麦林[1] 袁兵[1] 

机构地区：[1]天津大学应用物理系,天津300072

出　　处：《哈尔滨工业大学学报》2002年第6期794-796,800,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(20176035);教育部留学回国人员基金资助项目.

摘　　要：为提高信号的稳定性和保真度,对电路中的量子涨落进行了研究.利用热场动力学(TFD)方法计算了有限温度下介观电容耦合电路中的量子涨落.在零温情况下,电容耦合电路的本征态是平移Fock态.有限温度时,这些态成为热平移Fock态.计算结果表明,对于以往未加注意的电路耦合部分,电容耦合使电荷的量子涨落减小,电流的量子涨落增加.Using the thermal field dynamics, the quantum fluctuations in the capacitive coupled electric circuits at finite temperature are calculated. At zero temperature, the eigenstates of the capacitive coupled electric circuit are the displaced Fock states. At finite temperature, the states become the thermal displaced Fock states. The results show that in the coupling part of the circuit, the capacitance coupling reduces the quantum fluctuation of the electric charge and increases that of the electric current.

关 键 词：有限温度 电容耦合电路 量子涨落 温度效应 热场动力学 介观电路 量子电子学 

分 类 号：TN201[电子电信—物理电子学]