Baumgratz T, Cramer M, Plenio M B
Institut für Theoretische Physik, Albert-Einstein-Allee 11, Universität Ulm, 89069 Ulm, Germany.
Phys Rev Lett. 2014 Oct 3;113(14):140401. doi: 10.1103/PhysRevLett.113.140401. Epub 2014 Sep 29.
We introduce a rigorous framework for the quantification of coherence and identify intuitive and easily computable measures of coherence. We achieve this by adopting the viewpoint of coherence as a physical resource. By determining defining conditions for measures of coherence we identify classes of functionals that satisfy these conditions and other, at first glance natural quantities, that do not qualify as coherence measures. We conclude with an outline of the questions that remain to be answered to complete the theory of coherence as a resource.
我们引入了一个用于量化相干性的严格框架，并确定了直观且易于计算的相干性度量。我们通过将相干性视为一种物理资源的观点来实现这一点。通过确定相干性度量的定义条件，我们识别出满足这些条件的泛函类以及其他乍一看很自然但不符合相干性度量资格的量。我们最后概述了为完善作为一种资源的相干性理论仍有待回答的问题。
