arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.3739quant-ph
收藏

可由可分操作实现的非定域纠缠变换

Nonlocal Entanglement Transformations Achievable by Separable Operations

Eric Chitambar, Runyao Duan

摘要:

对于多体量子系统的操纵,众所周知,所有经典通信(LOCC)辅助的局部操作构成可分操作类的真子集。最近,Gheorghiu和Griffiths发现LOCC和一般的可分操作对于两体纯态之间的转换同样强大。在这封信中,我们将这种比较扩展到混合态,并表明在一般情况下,可分离操作严格强于LOCC时,将混合态转换为纯纠缠态。我们的发现的一个显着的后果是纠缠单调的存在下,可能会增加可分离操作。

英文摘要:

For manipulations of multipartite quantum systems, it was well known that all local operations assisted by classical communication (LOCC) constitute a proper subset of the class of separable operations. Recently, Gheorghiu and Griffiths found that LOCC and general separable operations are equally powerful for transformations between bipartite pure states. In this letter we extend this comparison to mixed states and show that in general separable operations are strictly stronger than LOCC when transforming a mixed state to a pure entangled state. A remarkable consequence of our finding is the existence of entanglement monotone which may increase under separable operations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑