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arXiv 0708.3909quant-ph
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量子态分辨的无信号界

No-Signalling Bound on Quantum State Discrimination

Sarah Croke, Erika Andersson, Stephen M. Barnett

摘要:

量子关联不允许信号,任何可能在纠缠对的一个系统上执行的操作都不能通过单独测量另一个系统来检测。这种无信号条件限制了允许的操作,并且在量子通信的上下文中,可以用于对量子态区分施加界限。我们发现,要考虑的自然品质因数是识别状态的置信度,这是由最大置信度策略优化的。我们表明,这种策略可能来自无信号条件,并证明最大置信度测量和纠缠浓度之间的关系。

英文摘要:

Quantum correlations do not allow signalling, and any operation which may be performed on one system of an entangled pair cannot be detected by measurement of the other system alone. This no-signalling condition limits allowed operations and, in the context of quantum communication, may be used to put bounds on quantum state discrimination. We find that the natural figure of merit to consider is the confidence in identifying a state, which is optimised by the maximum confidence strategy. We show that this strategy may be derived from the no-signalling condition, and demonstrate the relationship between maximum confidence measurements and entanglement concentration.

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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