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Distillation of free entanglement from bound entangled states using weak measurements

Baghbanzadeh, S ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevA.88.062320
  3. Publisher: 2013
  4. Abstract:
  5. We propose a scheme for distillation of free bipartite entanglement from bipartite bound entangled states. The crucial element of our scheme is an ancillary system that is coupled to the initial bound entangled state via appropriate weak measurements. We show that in this protocol free entanglement can be always generated with nonzero probability by using a single copy of the bound entangled state. We also derive a lower bound on the entanglement cost of the protocol and conclude that, on average, applying weaker measurements results in relatively higher values of free entanglement as well as lower costs
  6. Keywords:
  7. Ancillary system ; Bipartite entanglement ; Bound entangled state ; Lower bounds ; Non-zero probability ; Weak measurements ; Distillation ; Measurements ; Quantum entanglement
  8. Source: Physical Review A - Atomic, Molecular, and Optical Physics ; Volume 88, Issue 6 , 2013 ; ISSN: 10502947
  9. URL: http://journals.aps.org/pra/abstract/10.1103/PhysRevA.88.062320