Long distance quantum key distribution without decoy state

Details Long distance quantum key distribution without decoy state Long distance quantum key distribution without decoy state

2008-05-31

arxiv.org/abs/0806.0086v2

Physics

Quantum Physics

This paper has been withdrawn by the author due to the inaccurate result

Scientific paper

We present a method without decoy state to estimate faithfully and efficiently the yield and quantum bit error rate of single photon pulse for BB84 protocol. The numerical calculations show that key generation rate and maximal secure communication distance of our method are better than results of the decoy state method. As we know, it is the first time we present this method and the idea is very novel. Furthermore, our method can overcome the drawbacks of decoy state method. In our method, the maximal secure distance is insensitive to the deviation of dark count rate from exact value.

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