Experimental estimation of entanglement at the quantum limit
arXiv:0907.4117 · doi:10.1103/PhysRevLett.104.100501
Abstract
Entanglement is the central resource of quantum information processing and the precise characterization of entangled states is a crucial issue for the development of quantum technologies. This leads to the necessity of a precise, experimental feasible measure of entanglement. Nevertheless, such measurements are limited both from experimental uncertainties and intrinsic quantum bounds. Here we present an experiment where the amount of entanglement of a family of two-qubit mixed photon states is estimated with the ultimate precision allowed by quantum mechanics.
arXiv comment4 pages, 3 figures
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