Field Test of Quantum Key Distribution with High Key Creation Efficiency
arXiv:2406.07786 · doi:10.1364/OE.496966
Abstract
Quantumkey distribution (QKD) promises unconditional security for communication. However, the random choices of the measurement basis in QKD usually result in low key creation efficiency. This drawback is overcome in the differential-phase-shift QKD, provided that each photon can be prepared in a large number of time bins with a proper waveform. In this work we develop a miniature 1550-nm single-photon source to generate narrowband single photon in 50 time bins with a nearly optimal waveform for achieving unity key creation efficiency. By utilizing these single photons in the field test, we demonstrate the differential-phase-shift QKD with a key creation efficiency of 97%. Our work shows that the practical QKD can benefit from the narrowband single photons with controllable waveforms.
9pages, 4figures
References in corpus (12)
- Satellite-to-ground quantum key distribution
- Measurement device independent quantum key distribution over 404 km optical fibre
- Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
- Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
- Long term performance of the SwissQuantum quantum key distribution network in a field environment
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Experimental quantum key distribution beyond the repeaterless secret key capacity
- 2-GHz clock quantum key distribution over 260 km of standard telecom fiber
- Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation
- Unconditional Security of Single-Photon Differential Phase Shift Quantum Key Distribution
- Bright Single Photons for Light Matter Interaction
- Revival of Quantum Interference by Modulating the Biphotons