Distillation of GHZ states by selective information manipulation

Details Distillation of GHZ states by selective information manipulation Distillation of GHZ states by selective information manipulation

2000-01-23

arxiv.org/abs/quant-ph/0001084v2

Phys. Rev. Lett. 84, 5908 (2000).

Physics

Quantum Physics

minor corrections, especially of some numerical values; conclusions unaffected

Scientific paper

10.1103/PhysRevLett.84.5908

Methods for distilling maximally entangled tripartite (GHZ) states from arbitrary entangled tripartite pure states are described. These techniques work for virtually any input state. Each technique has two stages which we call primary and secondary distillation. Primary distillation produces a GHZ state with some probability, so that when applied to an ensemble of systems, a certain percentage is discarded. Secondary distillation produces further GHZs from the discarded systems. These protocols are developed with the help of an approach to quantum information theory based on absolutely selective information, which has other potential applications.

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