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Optimal estimation of two-qubit pure-state entanglement

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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.

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.61.062307

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Optimal estimation of two-qubit pure-state entanglement