Observable entanglement measures

ORAL

Abstract

We discuss the entanglement measure {\it concurrence} as an experimentally accessible quantity. In contrast to the original definition, the present is based only on physical observables. Therefore, concurrence can experimentally be measured without state reconstruction via quantum state tomography. The non-linearity necessary for any entanglement measure can be provided by measurements on two copies of the system states.

*Alexander von Humboldt Foundation, DAAD, CNPq, CAPES, PRONEX, FUJB, FAPERJ, Brazilian Millennium Institute for Quantum Information

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Authors

  • Florian Mintert

    • Harvard University

  • Stephen Walburn

  • Paulo Souto Ribeiro

  • Luiz Davidovich

    • Universidade Federal do Rio de Janeiro

  • Andreas Buchleitner

    • Max Planck Institute for the Physics of Complex Systems