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Entanglement measures as physical observables

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Preprint
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DOI: 10.1007/s00340-007-2864-7
Source
arXiv
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Abstract

We discuss why regular observables can not be proper entanglement measures, and how observables in a generalized setting can be used to make an entanglement monotone a directly observable quantity for the case of pure states. For the case of mixed states, these generalized observables can be used to find valid lower bounds on entanglement monotones that can be measured in laboratory experiments in the same fashion as it can also be done for pure states.

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