Inseparability Criterion for Continuous Variable Systems

Lu-Ming Duan, G. Giedke, J. I. Cirac, and P. Zoller
Phys. Rev. Lett. 84, 2722 – Published 20 March 2000
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Abstract

An inseparability criterion based on the total variance of a pair of Einstein-Podolsky-Rosen type operators is proposed for continuous variable systems. The criterion provides a sufficient condition for entanglement of any two-party continuous variable states. Furthermore, for all Gaussian states, this criterion turns out to be a necessary and sufficient condition for inseparability.

  • Received 17 August 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.2722

©2000 American Physical Society

Authors & Affiliations

Lu-Ming Duan1,2,*, G. Giedke1, J. I. Cirac1, and P. Zoller1

  • 1Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria
  • 2Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026, China

  • *Email address: luming.duan@uibk.ac.at

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Vol. 84, Iss. 12 — 20 March 2000

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