Entropic Entanglement Criteria for Continuous Variables

S. P. Walborn, B. G. Taketani, A. Salles, F. Toscano, and R. L. de Matos Filho
Phys. Rev. Lett. 103, 160505 – Published 15 October 2009

Abstract

We derive several entanglement criteria for bipartite continuous variable quantum systems based on the Shannon entropy. These criteria are more sensitive than those involving only second-order moments, and are equivalent to well-known variance product tests in the case of Gaussian states. Furthermore, they involve only a pair of quadrature measurements, and will thus prove extremely useful in the experimental identification of entanglement.

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  • Received 28 May 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.160505

©2009 American Physical Society

Authors & Affiliations

S. P. Walborn, B. G. Taketani, A. Salles, F. Toscano, and R. L. de Matos Filho

  • Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21941-972, Brazil

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Vol. 103, Iss. 16 — 16 October 2009

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