Inseparability criterion for continuous variable systems

Details Inseparability criterion for continuous variable systems Inseparability criterion for continuous variable systems

1999-08-17

arxiv.org/abs/quant-ph/9908056v2

Phys. Rev. Lett. 84, 2722 (2000)

Physics

Quantum Physics

minor changes in the introduction and refs

Scientific paper

10.1103/PhysRevLett.84.2722

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 the Gaussian states, this criterion turns out to be a necessary and sufficient condition for inseparability.

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