正则系综中介观耦合电路的量子涨落

The Quantum Fluctuation of a Mesoscopic Coupled Circuit in the Canonical Ensemble

在有限温度下 ,介观电路系统实际上并不处在一个确定的量子状态 ,而是处在混合态 .根据正则系综的密度矩阵导出耦合互感电路中电荷和电流的量子涨落 ,得到了量子涨落与温度的依赖关系 .

At a definite temperature a mesoscopic circuit isn't in a determinate quantum state instead of in the mixed state (or statistical state).Using the density matrix of the canonical ensemble,we have deduced the formulate of the quantum fluctuations of both charge and current in a non dissipative mesoscopic coupled circuit.And the dependences of the quantum fluctuation of the circuit on its temperature have obtained.