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Article

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Published version

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2000

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/9563

Optimal estimation of two-qubit pure-state entanglement

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http://dx.doi.org/10.1103/PhysRevA.61.062307

Abstract

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.

Subject

Teoria de la informació, Teoria quàntica

Subject (English)

Information theory, Quantum theory

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

ACÍN DAL MASCHIO, Antonio, TARRACH, R. and VIDAL BONAFONT, Guifré. Optimal estimation of two-qubit pure-state entanglement. Physical Review A. 2000. Vol. 61, num. 6, pags. 062307. ISSN 1050-2947. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/9563

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