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Bound entanglement for continuous variables is a rare phenomenon

Authors
  • Horodecki, Pawel
  • Cirac, J. Ignacio
  • Lewenstein, Maciej
Type
Preprint
Publication Date
Oct 18, 2001
Submission Date
Mar 14, 2001
Identifiers
arXiv ID: quant-ph/0103076
Source
arXiv
License
Unknown
External links

Abstract

We discuss the notion of bound entanglement (BE) for continuous variables (CV). We show that the set of non--distillable states (NDS) for CV is nowhere dense in the set of all states, i.e., the states of infinite--dimensional bipartite systems are generically distillable. This automatically implies that the sets of separable states, entangled states with positive partial transpose, and bound entangled states are also nowhere dense in the set of all states. All these properties significantly distinguish quantum CV systems from the spin like ones. The aspects of the definition of BE for CV is also analysed, especially in context of Schmidt numbers theory. In particular the main result is generalised by means of arbitrary Schmidt number and single copy regime.

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