Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Canada.
Phys Rev Lett. 2011 Jun 3;106(22):220403. doi: 10.1103/PhysRevLett.106.220403.
We devise a protocol in which general nonclassical multipartite correlations produce a physically relevant effect, leading to the creation of bipartite entanglement. In particular, we show that the relative entropy of quantumness, which measures all nonclassical correlations among subsystems of a quantum system, is equivalent to and can be operationally interpreted as the minimum distillable entanglement generated between the system and local ancillae in our protocol. We emphasize the key role of state mixedness in maximizing nonclassicality: Mixed entangled states can be arbitrarily more nonclassical than separable and pure entangled states.
我们设计了一种协议，其中一般的非经典多体相关性产生了一种物理相关的效应，导致了双体纠缠的产生。具体来说，我们表明，量子信息量的相对熵，它衡量量子系统子系统之间的所有非经典相关性，与我们协议中在系统和本地辅助之间生成的可提取纠缠的最小值等效，并可以在操作上进行解释。我们强调了状态混合度在最大化非经典性方面的关键作用：混合纠缠态可以比可分态和纯纠缠态任意地更具有非经典性。
