论文标题
催化的量子对纠缠浓度
Catalyzed entanglement concentration of qubit pairs
论文作者
论文摘要
我们通过分析获得最大概率，即通过使用两倍的催化剂状态将任意两量纯状状态的有限数量的副本转换为一个最大纠缠的两数Qubit纯状状态的单个副本。我们表明，这种转换的最佳催化剂总是比初始状态更纠缠，但是任何两分Qubit的状态都可以充当（非最佳）催化剂。有趣的是，最佳的两量催化剂状态的纠缠与初始状态的纠缠相结合。讨论了纠缠辅助策略以获取多个铃铛状态。
We analytically obtain the maximum probability of converting a finite number of copies of an arbitrary two-qubit pure state to a single copy of a maximally entangled two-qubit pure state via entanglement assisted local operations and classical communications using a two-qubit catalyst state. We show that the optimal catalyst for this transformation is always more entangled than the initial state but any two-qubit state can act as a (non-optimal) catalyst. Interestingly, the entanglement of the optimal two-qubit catalyst state is shown to decrease with that of the initial state. Entanglement assisted strategies for obtaining multiple Bell states are discussed.
