Experimental Passive Decoy-State Quantum Key Distribution
arXiv:1405.3761 · doi:10.1088/1612-2011/11/8/085202
Abstract
The decoy-state method is widely used in practical quantum key distribution systems to replace ideal single photon sources with realistic light sources by varying intensities. Instead of active modulation, the passive decoy-state method employs built-in decoy states in a parametric down-conversion photon source, which can decrease the side channel information leakage in decoy state preparation and hence increase the security. By employing low dark count up-conversion single photon detectors, we have experimentally demonstrated the passive decoy-state method over a 50-km-long optical fiber and have obtained a key rate of about 100 bit/s. Our result suggests that the passive decoy-state source is a practical candidate for future quantum communication implementation.
14 pages, 5 figures
References in corpus (9)
- Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
- Long distance decoy state quantum key distribution in optical fiber
- Simple and efficient quantum key distribution with parametric down-conversion
- Passive decoy state quantum key distribution: Closing the gap to perfect sources
- Quantum key distribution with triggering parametric down conversion sources
- Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock
- Passive sources for the Bennett-Brassard 1984 quantum key distribution protocol with practical signals
- Security of Quantum Key Distribution with Realistic Devices
- Quantum cryptography: theory and practice