Invariance of quantum correlations under local channel for a bipartite quantum state

被引：4

作者：

Hassan, Ali Saif M. ^{[1
]}

Joag, Pramod S. ^{[2
]}

机构：

[1] Univ Amran, Dept Phys, Amran, Yemen

[2] Univ Pune, Dept Phys, Pune 411007, Maharashtra, India

来源：

EPL | 2013年 / 103卷 / 01期

关键词：

ENTROPY;

D O I：

10.1209/0295-5075/103/10004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the quantum discord in a bipartite quantum state is invariant under the action of a local quantum channel if and only if the channel is invertible. We also show that the geometric measure of discord is preserved under the action of a local channel if the channel is invertible and if the metric used to define the geometric discord is monotonic. In particular, both versions of quantum discord are invariant under a local unitary channel. Copyright (c) EPLA, 2013

引用

页数：4

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