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

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

2008-03-25

arxiv.org/abs/0803.3643v1

Physics

Quantum Physics

17 pages, 6 figures

Scientific paper

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

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