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Paper detail

Experimental estimation of entanglement at the quantum limit

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.

preprint2009arXivOpen access
Giorgio BridaIvo DegiovanniAngela FlorioMarco GenovesePaolo GiordaAlice MedaMatteo G. A. ParisAlex Shurupov
quant-ph
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Giorgio BridaIvo DegiovanniAngela FlorioMarco GenovesePaolo GiordaAlice MedaMatteo G. A. ParisAlex Shurupov

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