有限温度下介观LC电路的热压缩效应

Thermosqueezing effect in a mesoscopic LC circuit at a finite temperature

应用热场动力学理论(TFD)研究了有限温度下介观LC电路量子态的演化,结果表明在外加冲激 信号的作用下,有限温度下介观电路系统的量子态将由初始的热真空态演化到热相干态,再由热相干态作进一 步的演化。在一定条件下,电荷或磁通量会出现热压缩效应;尤其是在适当条件和一定的温度以下,还会出现 典型的量子压缩效应。

The time evolution of a quantum state of mesoscopic LC circuit are studied in detail by using thermo-field dynamics （TFD） at a finite temperature. The result indicates that the quantum state of a mesoscopic LC circuit evolves from the thermal vacuum state to coherence state and go on by the action of an external impulse functional signal on the circuit; the thermal squeezing properties of charge and flux appear in the circuit under some conditions; and furthermore, the typical quantum squeezing effect may occur when certain conditions and particular temperature are meet.