脉冲信号对介观RLC电路量子态的影响

研究了外加脉冲信号对介观RLC电路量子态变化的影响.结果表明：当电路参数一定时，通过控制脉冲信号参数的变化可以调节介观电路量子态变化的跃迁概率；而当脉冲信号宽度是某个最小量的整数倍时，系统的量子态保持不变.最小量的值与电路参数有关，但与脉冲信号幅度无关.电阻越大，保持系统量子态稳定的脉冲信号最小宽度则越宽.关键词：介观RLC电路脉冲信号量子态

Influences of an external pulse on the quantum state of a mesoscopic RLC circuit

In this paper, the influences of an external pulse on the variation of the quantum state of a mesoscopic RLC circuit are investigated emphatically. Our research result indicates that the transition probabilities of the variation of the quantum state are adjusted by controlling the variation of the pulse parameters when the parameters of the mesoscopic circuit are constant. We point out that the quantum state of a system is stable when the width of the pulse is equal to the integral times of the minimum fixed value. The minimum fixed value is not related to the altitude of pulse but the circuit parameters. The larger the resistance, the wider the minimum fixed width of the external pulse.