Inseparability Criterion for Continuous Variable Systems
L.-M. DuanInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, AustriaG. GiedkeInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, AustriaJ. I. CiracInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, AustriaP. ZollerInstitut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria
2000en
ABI
Аннотация
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.
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