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Hybrid protocol for sending-or-not-sending twin-field quantum key distribution

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Abstract

We propose a hybrid protocol for sending-or-not-sending (SNS) twin-field quantum key distribution: replacing the signal source by heralded single-photon source (HSPS) in the original SNS protocol, while decoy sources are still unchanged. Numerical simulation shows that after adopting this HSPS, the performance in key rate and secure distance is much improved.

© 2020 Optical Society of America

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