Single-photon-based clock analysis and recovery in quantum key distribution
Year: 2023
Authors: Zahidy M., Ribezzo D., M’ller R., Riebesehl J., Zavatta A., Galili M., Oxenlowe LK., Bacco D.
Autors Affiliation: Tech Univ Denmark, Ctr Silicon Photon Opt Commun SPOC, Dept Elect & Photon Engn, Lyngby, Denmark; Ist Nazl Ottica, Consiglio Nazl Ric CNR INO LENS, I-50125 Sesto Fiorentino, Italy; Univ Napoli Federico II, Naples, Italy; QTI Srl, I-50125 Florence, Italy; Univ Florence, Dept Phys & Astron, I-50019 Florence, Italy.
Abstract: Quantum key distribution is one of the first quantum technologies ready for the market. Current quantum telecommunication systems usually utilize a service channel for synchronizing the transmitter (Alice) and the receiver (Bob). However, the possibility of removing this service channel and exploiting a clock recovery method are intriguing for future implementation, both in fiber and free-space links. In this paper, we investigate criteria to recover the clock in a quantum communication scenario and experimentally demonstrated the possibility of using a quantum-based clock recovery system in a time-bin quantum key distribution protocol. The performance of the clock recovery technique, in terms of quantum bit error rate and secret key rate, is equivalent to using the service channel for clock sharing.
Journal/Review: AVS QUANTUM SCIENCE
Volume: 5 (4) Pages from: 41403-1 to: 41403-9
More Information: This work was partially supported by the Center of Excellence SPOC-Silicon Photonics for Optical Communications (ref DNRF123), the Innovationsfonden (No. 9090-00031B, FIRE-Q), the EraNET Cofund Initiatives QuantERA within the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 731473, project SQUARE), by the NATO Science for Peace and Security program (Grant No. G5485, project SEQUEL), and the programme Rita Levi Montalcini QOMUNE (PGR19GKW5T).KeyWords: SynchronizationDOI: 10.1116/5.0167549Connecting to view paper tab on IsiWeb: Click here