Abstract
We present optimal measuring strategies for the estimation of the\nentanglement of unknown two-qubit pure states and of the degree of mixing of\nunknown single-qubit mixed states, of which N identical copies are available.\nThe most general measuring strategies are considered in both situations, to\nconclude in the first case that a local, although collective, measurement\nsuffices to estimate entanglement, a non-local property, optimally.\n
Keywords
Quantum entanglementQubitMixing (physics)State (computer science)Property (philosophy)Statistical physicsMathematicsQuantum mechanicsPhysicsQuantumAlgorithm
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Publication Info
- Year
- 2000
- Type
- article
- Volume
- 61
- Issue
- 6
- Citations
- 31
- Access
- Closed
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Cite This
Antonio Acín,
R. Tarrach,
Guifré Vidal
(2000).
Optimal estimation of two-qubit pure-state entanglement.
Physical Review A
, 61
(6)
.
https://doi.org/10.1103/physreva.61.062307
Identifiers
- DOI
- 10.1103/physreva.61.062307