Optimal estimation of two-qubit pure-state entanglement
Quantum Physics
2009-10-31 v1
Abstract
We present optimal measuring strategies for the 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 non-local property, optimally.
Cite
@article{arxiv.quant-ph/9911008,
title = {Optimal estimation of two-qubit pure-state entanglement},
author = {A. Acin and R. Tarrach and G. Vidal},
journal= {arXiv preprint arXiv:quant-ph/9911008},
year = {2009}
}
Comments
REVTEX, 9 pages, 1 figure