Quantum Discord: A Dynamic Approach in Geometric Picture

Details Quantum Discord: A Dynamic Approach in Geometric Picture Quantum Discord: A Dynamic Approach in Geometric Picture

2011-07-22

arxiv.org/abs/1107.4457v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

We present a dynamic approach to study the quantum discord and classical correlation. By local filtering operation, the evaluation of quantum discord is closely related to quantum channel and channel capacity. As a consequence, the traditional optimization over horizontal-or-vertical von Neumann measurements is replaced by that over horizontal-and-vertical three-element POVM measurement, from which more rigorous results of quantum discord are obtained.

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