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arXiv quant-ph/0205105quant-ph
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最大纠缠态的可分辨性

Distinguishability of maximally entangled states

Sibasish Ghosh, Guruprasad Kar, Anirban Roy, Debasis Sarkar

摘要:

在$2 \otimes 2$中,如果只允许局部操作和经典通信(LOCC),则不能确定地区分具有单个副本的2个以上的正交Bell态。在$d \otimed d$中,我们得到了比Bennett等人所用的正则形式的$d$正交最大纠缠态更多的正交最大纠缠态。[Phys. Rev. Lett. 70(1993)1895]在提供状态的单个副本时,永远不能肯定地区分。有趣的是,我们发现,所有正交的最大纠缠态,这是在典型的形式,可以确定性的区别,当且仅当每个国家的两个副本提供。本文还讨论了在$d \otimes d$(单拷贝情况)中局部判别$d$或使两两正交最大纠缠态的个数更少的高度非平凡问题。

英文摘要:

In $2 \otimes 2$, more than 2 orthogonal Bell states with single copy can never be discriminated with certainty if only local operations and classical communication (LOCC) are allowed. More than $d$ orthogonal maximally entangled states in $d \otimed d$, which are in cannonical form, used by Bennett et. al. [Phys. Rev. Lett. 70 (1993) 1895] can never be discriminated with certainty when a single copy of the states is provided. Interestingly we show that all orthogonal maximally entangled states, which are in cannonical form, can be discriminated with certainty if and only if two copies of each of the states are provided. The highly nontrivial problem of local discrimination of $d$ or less no. of pairwise orthogonal maximally entangled states in $d \otimes d$ (in single copy case), which are in cannonical form, is also discussed.

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。

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