Abstract:

he authors took the LC circuit as an example to discuss the relationship between the time evolution formula for the charge mean value in mesoscopic circuit and the Kirchoffs law, put forward the equation satisfying the wave function of coherent state,  the wave function of coherent state of LC circuit and  the quasi-classical wave function satisfying the Schrdinger equation, the current intensity, the quantum fluctuation and the quantum phase, and discussed the motion characteristics of wave packet.

Key words: mesoscopic circuit, coherent state, quasi\, classical description