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arXiv quant-ph/0407172quant-ph
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几种量子信息基准的混合态灵敏度

Mixed state sensitivity of several quantum information benchmarks

Nicholas A. Peters, Tzu-Chieh Wei, Paul G. Kwiat

摘要:

我们调查的灵敏度之间的不平衡的共同状态的措施-保真度,迹距离,并发,缠结,冯诺伊曼熵和线性熵-当作用于一个去极化通道。此外,在这种情况下,我们探讨了两类两量子比特纠缠混合态。具体来说,我们说明了三个这些措施之间的敏感性不平衡去极化(即,Werner-state like)非最大纠缠和最大纠缠混合态,注意到不平衡的大小取决于状态的纠缠和线性熵。

英文摘要:

We investigate an imbalance between the sensitivity of the common state measures--fidelity, trace distance, concurrence, tangle, von Neumann entropy and linear entropy--when acted on by a depolarizing channel. Further, in this context we explore two classes of two-qubit entangled mixed states. Specifically, we illustrate a sensitivity imbalance between three of these measures for depolarized (i.e., Werner-state like) nonmaximally entangled and maximally entangled mixed states, noting that the size of the imbalance depends on the state's tangle and linear entropy.

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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