Physics – Quantum Physics
Scientific paper
2002-08-21
Phys. Rev. A 67, 022110 (2003)
Physics
Quantum Physics
13 pages, 12 figures
Scientific paper
10.1103/PhysRevA.67.022110
Maximally entangled mixed states are those states that, for a given mixedness, achieve the greatest possible entanglement. For two-qubit systems and for various combinations of entanglement and mixedness measures, the form of the corresponding maximally entangled mixed states is determined primarily analytically. As measures of entanglement, we consider entanglement of formation, relative entropy of entanglement, and negativity; as measures of mixedness, we consider linear and von Neumann entropies. We show that the forms of the maximally entangled mixed states can vary with the combination of (entanglement and mixedness) measures chosen. Moreover, for certain combinations, the forms of the maximally entangled mixed states can change discontinuously at a specific value of the entropy.
Goldbart Paul M.
Kwiat Paul G.
Munro William J.
Nemoto Kae
Verstraete Frank
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