Single-experiment-detectable nonclassical correlation witness

Details Single-experiment-detectable nonclassical correlation witness Single-experiment-detectable nonclassical correlation witness

2009-11-18

arxiv.org/abs/0911.3460v3

Phys. Rev. A 82, 022314 (2010)

Physics

Quantum Physics

5 pages, 1 figure; v2: minor revisions, also an analytical proof has been added; v3: to appear in Phys. Rev. A, a theorem adde

Scientific paper

10.1103/PhysRevA.82.022314

Recent progress in theories of quantum information has determined nonclassical correlation defined differently from widely-used entanglement as an important property to evaluate computation and communication with mixed quantum states. We introduce an operational method to detect nonclassical correlation of bipartite systems. In this method, we use particular maps analogous to the well-established entanglement witnesses. Thus, the maps are called nonclassical correlation witness maps. Furthermore, it is proved that such a map can be generally decomposed so that a single-run experiment is feasible for implementation in bulk-ensemble systems.

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