Efficient multipartite entanglement purification with the entanglement link from a subspace

Efficient multipartite entanglement purification with the entanglement link from a subspace

We present an efficient multipartite entanglement purification protocol (MEPP) for N-photon systems in a Greenberger-Horne-Zeilinger state with parity-check detectors. It contains two parts. One is the conventional MEPP with which the parties can obtain a high-fidelity N-photon ensemble directly, si...

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Veröffentlicht in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2011-11, Vol.84 (5), Article 052312
1. Verfasser: Deng, Fu-Guo
Format: Artikel
Sprache:eng
Schlagworte:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
EFFICIENCY
ERRORS
GATING CIRCUITS
PARITY
PHOTONS
POTENTIALS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUANTUM STATES
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Zusammenfassung:We present an efficient multipartite entanglement purification protocol (MEPP) for N-photon systems in a Greenberger-Horne-Zeilinger state with parity-check detectors. It contains two parts. One is the conventional MEPP with which the parties can obtain a high-fidelity N-photon ensemble directly, similar to the MEPP with controlled-not gates. The other is our recycling MEPP in which the entanglement link is used to produce some N-photon entangled systems from entangled N{sup '}-photon subsystems (2{
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.84.052312