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arXiv 1704.04871quant-ph
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基于斜信息的量子相干性及其多配性

Quantum Coherence via Skew Information and Its Polygamy

Chang-shui Yu

摘要:

量子相干性的量化是量子力学理论和实际应用中的一个关键问题。利用感兴趣态的量子偏斜信息,给出了一种可靠的量子相干性测度.证明了这种相干性测度满足最近在量子相干性资源理论中引入的所有判据(特别是强单调性)。相干测度在量子精密测量中具有解析表达式和明显的操作意义。根据这种相干性度量,可以得到量子相干性的分布,即,研究了量子相干性如何在多方之间分配,并提出了相应的一夫多妻关系。作为进一步的应用,我们发现相干测度形成了由非相干操作准备的量子关联的自然上界。最后研究了相干性测度以及相对熵相干性、$l_p$ -范数相干性的实验测量。

英文摘要:

Quantifying coherence is a key task in both quantum mechanical theory and practical applications. Here, a reliable quantum coherence measure is presented by utilizing the quantum skew information of the state of interest subject to a certain broken observable. This coherence measure is proven to fulfill all the criteria (especially the strong monotonicity) recently introduced in the resource theories of quantum coherence. The coherence measure has an analytic expression and an obvious operational meaning related to quantum metrology. In terms of this coherence measure, the distribution of the quantum coherence, i.e., how the quantum coherence is distributed among the multiple parties is studied and a corresponding polygamy relation is proposed. As a further application, it is found that the coherence measure forms the natural upper bounds for quantum correlations prepared by incoherent operations. The experimental measurement of our coherence measure as well as the relative-entropy coherence, $l_p$-norm coherence is studied finally.

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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