论文标题
量子相干界定分布式不和谐
Quantum Coherence Bounds the Distributed Discords
论文作者
论文摘要
通过发送信息载体来建立两个远程方之间的量子相关是量子信息处理中许多协议的重要步骤。我们在双方系统中获得不和谐与连贯性之间的权衡关系。然后，我们使用相对熵和互信息的关系研究了连贯性在两部分量子态中的分布。我们表明，两个远程各方之间不和谐的相对熵的增加是由载体与两个远程方之间相干性相对熵量化的非分类相关性的界定，为不和谐分布提供了最佳协议，并表明量子相关是此类任务的必要资源。
Establishing quantum correlations between two remote parties by sending an information carrier is an essential step of many protocols in quantum information processing. We obtain trade-off relations between discords and coherence within a bipartite system. Then we study the distribution of coherence in a bipartite quantum state by using the relations of relative entropy and mutual information. We show that the increase of the relative entropy of discord between two remote parties is bounded by the nonclassical correlations quantified by the relative entropy of coherence between the carrier and two remote parties, providing an optimal protocol for discord distribution and showing that quantum correlations are the essential resource for such tasks.
