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Entanglement measures as physical observables

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Abstract

We discuss why regular observables cannot 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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Authors and Affiliations

  1. Department of Physics, Harvard University, 17 Oxford Street, Cambridge, MA, 02138, USA

    F. Mintert

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  1. F. Mintert
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Correspondence to F. Mintert.

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PACS

03.67.-a; 03.67.Mn; 89.70.+c

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Mintert, F. Entanglement measures as physical observables. Appl. Phys. B 89, 493–497 (2007). https://doi.org/10.1007/s00340-007-2864-7

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  • DOI: https://doi.org/10.1007/s00340-007-2864-7

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