A comparative study of relative entropy of entanglement, concurrence and negativity

@article{Miranowicz2004ACS,
  title={A comparative study of relative entropy of entanglement, concurrence and negativity},
  author={Adam Miranowicz and Andrzej Grudka},
  journal={Journal of Optics B-quantum and Semiclassical Optics},
  year={2004},
  volume={6},
  pages={542-548}
}
The problem of ordering of two-qubit states imposed by the relative entropy of entanglement (E )i n comparison with the concurrence (C )a ndnegativity (N )i s studied. Analytical examples of states consistently and inconsistently ordered by the entanglemen tm easures are given. In particular, the states for which any of the three measures imposes order opposite to that given by the other two measures are described. Moreover, examples are given of pairs of 

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