Experimental Decoy Quantum Key Distribution Up To 130KM Fiber

Details Experimental Decoy Quantum Key Distribution Up To 130KM Fiber Experimental Decoy Quantum Key Distribution Up To 130KM Fiber

2007-04-23

arxiv.org/abs/0704.2941v2

Chin.Phys.Lett 25, 3547 (2008)

Physics

Quantum Physics

4 pages, 2figures

Scientific paper

10.1088/0256-307X/25/10/008

Decoy State Quantum Key Distribution (QKD), being capable of beating PNS attack and uncon- ditionally secure, have become an attractive one recently. But, in many QKD systems, disturbances of transmission channel make quantum bit error rate (QBER) increase which limits both security distance and key bit rate of real-life decoy state QKD systems. We demonstrate the two-intensity decoy QKD with one-way Faraday-Michelson phase modulation system, which is free of channel dis- turbance and keeps interference fringe visibility (99%) long period, near 130KM single mode optical fiber in telecom (1550 nm) wavelength. This is longest distance fiber decoy state QKD system based on two intensity protocol.

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