arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0510078quant-ph
收藏

纠缠激活与量子关联的鲁棒性

Entanglement activation and the robustness of quantum correlations

Fernando G. S. L. Brandao

摘要:

我们证明了在隐形传态协议中作为激活剂的状态的有用性等价于其纠缠对噪声的鲁棒性。二分态纠缠的鲁棒性与当二分态作为额外资源时,任何其他态的隐形传态保真度的最大增加有关。一方面,这种联系为纠缠的鲁棒性提供了操作意义。另一方面,它表明,激活能力-这有一个核心作用,作为量化束缚纠缠态的操作方式-可以通过测量纠缠证人实验估计。

英文摘要:

We show that the usefulness of a state as an activator in teleportation protocols is equivalent to the robustness of its entanglement to noise. The robustness of entanglement of a bi-partite state is linked to the maximum increase in the the fidelity of teleportation of any other state when the former is used as an extra resource. On the one hand, this connection gives an operational meaning to the robustness of entanglement. On the other hand, it shows that the activation capability - which has a central role as an operational way of quantifying bound entangled states - can be estimated experimentally by measuring entanglement witnesses.

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。

↑