Stable polarization-encoded quantum key distribution in fiber

Details Stable polarization-encoded quantum key distribution in fiber Stable polarization-encoded quantum key distribution in fiber

2006-06-13

arxiv.org/abs/quant-ph/0606108v1

Physics

Quantum Physics

14 pages, 4 figures

Scientific paper

Polarizations of single-photon pulses have been controlled with long-term stability of more than 10 hours by using an active feedback technique for auto-compensation of unpredictable polarization scrambling in long-distance fiber. Experimental tests of long-term operations in 50, 75 and 100 km fibers demonstrated that such a single-photon polarization control supported stable polarization encoding in long-distance fibers to facilitate stable one-way fiber system for polarization-encoded quantum key distribution, providing quantum bit error rates below the absolute security threshold.

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