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arXiv:1412.0832 · Physical Review Letters

Long-Distance Measurement-Device-Independent Multiparty Quantum Communication

Yao Fu, Hua‐Lei Yin, Teng‐Yun Chen, Zeng‐Bing Chen

Published Mar 2, 2015• 206 citations
arXivHTMLPDF

Abstract

The Greenberger-Horne-Zeilinger (GHZ) entanglement, originally introduced to uncover the extreme violation of local realism against quantum mechanics, is an important resource for multiparty quantum communication tasks. But the low intensity and fragility of the GHZ entanglement source in current conditions have made the practical applications of these multiparty tasks an experimental challenge. Here we propose a feasible scheme for practically distributing the postselected GHZ entanglement over a distance of more than 100 km for experimentally accessible parameter regimes. Combining the decoy-state and measurement-device-independent protocols for quantum key distribution, we anticipate that our proposal suggests an important avenue for practical multiparty quantum communication.

DOI
10.1103/physrevlett.114.090501

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