基于量子Zeno效应的量子态纯化研究

Study on Quantum State Purification Based on Quantum Zeno Effect

量子Zeno效应表述为频繁地测量不稳定量子系统可以阻止其初始态的变化.辅助系统与目标系统存在相互作用,当辅助系统被频繁地测量时,目标系统的量子态可以被驱动着向目标量子态变化,这就是由量子Zeno效应衍生出来的量子Zeno-like测量.基于此测量可以设计出只需要一次操作就可以实现完美的量子态纯化方案.

Quantum Zeno effect can be expressed as frequent measurements on an unstable quantum system , whieh ean prevent the ehange of its initial state. An auxiliary system and target system interaet with eaeh other. When the auxiliary one is measured frequently,the state of the target one ean be driven to the target state, This is quantum Zeno-like measurement derived from quantum Zeno effeet.Based on this measurement, we ean design a perfeet seheme of state purifieation with only one operation.