论文标题
集合一致性：量子相干性的基础独立量化
Set coherence: basis-independent quantification of quantum coherence
论文作者
论文摘要
只有在参考优先基础时，才能有意义地讨论单个量子状态的连贯性。但是，在考虑一组量子状态时，可以解除这种任意性。在这里，我们介绍了以基于基础独立的方式表征一组量子系统的连贯性的集合相干性的概念。我们构建了量化量子状态集和量子测量值集合的集合的度量。这些措施在歧视游戏方面具有操作含义，并精确地捕获了给定设置比不连贯性的优势。一路上，我们还将设定连贯性的概念与最近为量子系统开发的各种资源理论方法联系起来。
The coherence of an individual quantum state can be meaningfully discussed only when referring to a preferred basis. This arbitrariness can however be lifted when considering sets of quantum states. Here we introduce the concept of set coherence for characterising the coherence of a set of quantum systems in a basis-independent way. We construct measures for quantifying set coherence of sets of quantum states as well as quantum measurements. These measures feature an operational meaning in terms of discrimination games and capture precisely the advantage offered by a given set over incoherent ones. Along the way, we also connect the notion of set coherence to various resource-theoretic approaches recently developed for quantum systems.
