An improved scheme on decoy-state method for measurement-device-independent quantum key distribution.

ABSTRACT: Quantum key distribution involving decoy-states is a significant application of quantum information. By using three-intensity decoy-states of single-photon-added coherent sources, we propose a practically realizable scheme on quantum key distribution which approaches very closely the ideal asymptotic case of an infinite number of decoy-states. We make a comparative study between this scheme and two other existing ones, i.e., two-intensity decoy-states with single-photon-added coherent sources, and three-intensity decoy-states with weak coherent sources. Through numerical analysis, we demonstrate the advantages of our scheme in secure transmission distance and the final key generation rate.

SUBMITTER: Wang D 

PROVIDER: S-EPMC4604557 | biostudies-other | 2015

REPOSITORIES: biostudies-other