论文标题
X状态的连贯同时发生
Coherence Concurrence for X States
论文作者
论文摘要
我们研究一致性并发的特性，并提出了类似于援助连贯性的物理解释。我们给出了最佳的纯态分解，该状态分解达到了量子状态的连贯性并发。我们以另一种方式证明了直接总和操作下连贯同时发生的加性。使用这些结果，我们通过分析计算X状态的相干并发，并显示其最佳分解。此外，我们表明一致性并发恰好是Schmidt相关状态的凸屋顶的两倍，因此建立了连贯并发和量子纠缠之间的直接关系。
We study the properties of coherence concurrence and present a physical explanation analogous to the coherence of assistance. We give an optimal pure state decomposition which attains the coherence concurrence for qubit states. We prove the additivity of coherence concurrence under direct sum operations in another way. Using these results, we calculate analytically the coherence concurrence for X states and show its optimal decompositions. Moreover, we show that the coherence concurrence is exactly twice the convex roof extended negativity of the Schmidt correlated states, thus establishing a direct relation between coherence concurrence and quantum entanglement.
