The quantum fluctuations of the charge and current of each loop are researched by the method of thermo-field dynamics (TFD) in thermal vacuum state, thermal coherent state and thermal squeezed state.

• 在热场动力学(TFD)理论框架下，研究了热真空态、热相干态及热压缩态下回路中电荷和电流的量子涨落。