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. 2005 Dec 2;95(23):230502.
doi: 10.1103/PhysRevLett.95.230502. Epub 2005 Nov 28.

Inseparability criteria for continuous bipartite quantum states

E Shchukin  1 , W Vogel
Affiliations

Inseparability criteria for continuous bipartite quantum states

E Shchukin et al. Phys Rev Lett. .

Erratum in

  • Phys Rev Lett. 2005 Dec 9;95(24):249904
  • Phys Rev Lett. 2006 Mar 31;96(12):129902

Abstract

We provide necessary and sufficient conditions for the partial transposition of bipartite harmonic quantum states to be nonnegative. The conditions are formulated as an infinite series of inequalities for the moments of the state under study. The violation of any inequality of this series is a sufficient condition for entanglement. Previously known entanglement conditions are shown to be special cases of our approach.

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