Decoy State Quantum Key Distribution With Modified Coherent State

Details Decoy State Quantum Key Distribution With Modified Coherent State Decoy State Quantum Key Distribution With Modified Coherent State

2007-04-29

arxiv.org/abs/0704.3833v1

PHYSICAL REVIEW A 76, 014304 (2007)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.76.014304

To beat PNS attack, decoy state quantum key distribution (QKD) based on coherent state has been studied widely. We present a decoy state QKD protocol with modified coherent state (MCS). By destruction quantum interference, MCS with fewer multi-photon events can be get, which may improve key bit rate and security distance of QKD. Through numerical simulation, we show about 2-dB increment on security distance for BB84 protocol.

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