Distillation of Greenberger-Horne-Zeilinger states by selective information manipulation

Distillation of Greenberger-Horne-Zeilinger states by selective information manipulation

Methods for distilling Greenberger-Horne-Zeilinger (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 distillations. Primary distillation produces a GHZ sta...

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Veröffentlicht in:Physical review letters 2000-06, Vol.84 (25), p.5908-5911
Hauptverfasser: Cohen, O, Brun, T A
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Information Theory
Quantum Theory
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description Methods for distilling Greenberger-Horne-Zeilinger (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 distillations. 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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Quantum Theory
title Distillation of Greenberger-Horne-Zeilinger states by selective information manipulation
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