【摘要】 利用局域操作的方法可以把一个初始纠缠态转化为一个目标纠缠态,在这个过程中会损失一定量的量子纠缠。文献[10]证明可以用一个附加纠缠态部分地恢复丢失的量子纠缠,但附加纠缠态的纠缠度必须大于目标纠缠态的纠缠度.本文证明当不满足这一条件时,可以用纠缠催化作用辅助恢复丢失的量子纠缠.我们发现催化剂纠缠态的纠缠度必须大于目标纠缠态的纠缠度。更多还原

【Abstract】 When an initial entangled state is transformed into a target entangled state by local operations and classical communication (LOCC), the quantity of entanglement of the initial state decreases. Morikoshi (reference [10]) showed that the entanglement lost in the transformation can be partially recovered by an auxiliary entangled state. However, the entanglement degree of the auxiliary entangled state is required to be larger than that of the target state. This paper shows that the entanglement catalysis can be used to assist the recovery of the entanglement even the entanglement degree of the auxiliary entangled state is less than that of the target state. Some necessary conditions for the entanglement catalysis are also given.更多还原