The role of quantum discord in reduction of the lower bound of entropic uncertainty relation in presence of quantum memory

Details The role of quantum discord in reduction of the lower bound of entropic uncertainty relation in presence of quantum memory The role of quantum discord in reduction of the lower bound of entropic uncertainty relation in presence of quantum memory

2012-02-05

arxiv.org/abs/1202.0939v4

Physics

Quantum Physics

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Scientific paper

The uncertainty of measurement on a quantum system can be reduced in presence of quantum memory [M. Berta et. al. Nature Phys. {\bf 6}, 659 (2010)]. By measurement on quantum memory, some information (non-classical information) is inaccessible, hence, it limits the lower bound of entropic uncertainty relation. In the present work, we improve the lower bound of entropic uncertainty relation in presence of quantum memory by considering inaccessibility of non classical correlation at Bob side and also compare the lower bound given by M. Berta et. al. and our prescription for two different kind of shared bipartite state.

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