激发相干态下双模介观传输线的量子效应

The Quantum Effects of Double Mode Mesoscopic Transmission Line in Excited Coherent State

将介观无损耗传输线中的驻波场看成作相对运动的两列同频率的行波的叠加 ,此电路量子化后成为两个频率相同、不同模的光子场。计算和分析了激发相干态下电压和电流梯度的量子涨落 ,指出了双模传输线与一般的LC电路、双模传输线与单模传输线量子涨落的异同之处。

The standing wave field in a mesoscopic transmission line is regarded as the superposition of two traveling waves having the same frequency and trave ling in opposite direction. The double mode photon field with the same frequency is given by quantizing the transmission line. An analysis is made for the quant u m fluctuations of the voltage and current gradient of the line in excited cohere nt state,and the difference between the double mode transmission line and LC cir cuit , the double mode and single mode transmission line is discussed.