Generalizations of Quantum Discord
arXiv:1012.0632 · doi:10.1088/1751-8113/44/44/445310
Abstract
The original definition of quantum discord of bipartite states was defined over projective measurements, in this paper we discuss some generalizations of it. These generalizations are defined over general measurements, rank-one general measurements or Neumark extension measurements. We investigate the nonnegativity, zero-discord sets of all these quantum discords and some properties about them.
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