Decoy State Quantum Key Distribution With Modified Coherent State
arXiv:0704.3833 · doi:10.1103/PhysRevA.76.014304
Abstract
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.
4 pages, 4 figures
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- Gaussian private quantum channel with squeezed coherent states
- On the negativity of the Wigner function as a measure of entanglement under quantum polarization converter devices