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Optimal estimation of two-qubit pure-state entanglement
Acín dal Maschio, Antonio; Tarrach, R., 1948-; Vidal Bonafont, Guifré
Universitat de Barcelona
We present optimal measuring strategies for an estimation of the entanglement of unknown two-qubit pure states and of the degree of mixing of unknown single-qubit mixed states, of which N identical copies are available. The most general measuring strategies are considered in both situations, to conclude in the first case that a local, although collective, measurement suffices to estimate entanglement, a nonlocal property, optimally.
Teoria de la informació
Teoria quàntica
Information theory
Quantum theory
(c) The American Physical Society, 2000
The American Physical Society

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