论文标题
估计量子相干性的通用方法
Universal Method to Estimate Quantum Coherence
论文作者
论文摘要
连贯性是量子理论的定义属性，它在许多量子信息任务中都占量子优势。尽管已经在各种情况下引入了许多相干量化器，但缺乏有效的方法来估算它们会限制其应用。在本文中，我们通过提出一种通用方法来解决此问题，以为大多数当前相干量化符提供可衡量的界限。我们的方法是由观察到的观察结果，即感兴趣状态与其对角线部分之间的距离，这是连贯量化的核心，可以通过干扰效应和参考测量的不确定性来估算一致性量化的核心。因此，我们的边界连贯性方法为检测连贯性提供了可行且广泛的途径，从而促进了其进一步的实际应用。
Coherence is a defining property of quantum theory that accounts for quantum advantage in many quantum information tasks. Although many coherence quantifiers have been introduced in various contexts, the lack of efficient methods to estimate them restricts their applications. In this paper, we tackle this problem by proposing one universal method to provide measurable bounds for most current coherence quantifiers. Our method is motivated by the observation that the distance between the state of interest and its diagonal parts in reference basis, which lies at the heart of the coherence quantifications, can be readily estimated by disturbance effect and uncertainty of the reference measurement. Thus, our method of bounding coherence provides a feasible and broadly applicable avenue for detecting coherence, facilitating its further practical applications.
