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In this paper, we describe a robust quantum cryptography scheme with aheralded single photon source based on the decoy-state method, which has beenshown by numerical simulations to be advantageous compared with many otherpractical schemes not only with respect to the secure key generation rate butalso to secure transmission distance. We have experimentally tested thisscheme, and the results support the conclusions from numerical simulationswell. Although there still exist many deficiencies in our present systems, it'sstill sufficient to demonstrate the advantages of the scheme. Besides, evenwhen cost and technological feasibility are taken into account, our scheme isstill quite promising in the implementation of tomorrow's quantum cryptography.

Robust quantum cryptography with a heralded single-photon source based on the decoy-state method