Recovery of entanglement lost in entanglement manipulation

Details Recovery of entanglement lost in entanglement manipulation Recovery of entanglement lost in entanglement manipulation

1999-11-05

arxiv.org/abs/quant-ph/9911019v2

Phys. Rev. Lett. 84, 3189 (2000)

Physics

Quantum Physics

4 pages, 2 figures, REVTeX; minor corrections

Scientific paper

10.1103/PhysRevLett.84.3189

When an entangled state is transformed into another one with probability one by local operations and classical communication, the quantity of entanglement decreases. This letter shows that entanglement lost in the manipulation can be partially recovered by an auxiliary entangled pair. As an application, a maximally entangled pair can be obtained from two partially entangled pairs with probability one. Finally, this recovery scheme reveals a fundamental property of entanglement relevant to the existence of incomparable states.

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