200km Decoy-state quantum key distribution with photon polarization

Details 200km Decoy-state quantum key distribution with photon polarization 200km Decoy-state quantum key distribution with photon polarization

2009-08-27

arxiv.org/abs/0908.4063v1

Physics

Quantum Physics

8 pages, 1 figure, 1 table

Scientific paper

We demonstrate the decoy-state quantum key distribution over 200 km with photon polarization through optical fiber, by using super-conducting single photon detector with a repetition rate of 320 Mega Hz and a dark count rate of lower than 1 Hz. Since we have used the polarization coding, the synchronization pulses can be run in a low frequency. The final key rate is 14.1 Hz. The experiment lasts for 3089 seconds with 43555 total final bits.

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