Experimental Synchronization of a Quantum Communication System
DOI: 10.21293/1818-0442-2024-27-3-37-41
Abstract: The article considers an algorithm for detecting an optical signal pulse during the clock synchronization of a quantum key distribution system. Several methods for synchronizing quantum communication equipment are reviewed and it is shown that the distinctive characteristics are reduced to the values of the probability of correctly detecting a signal time interval containing an optical pulse and the average time of entering synchronization. The scheme of the experimental setup is described and the results of full-scale studies of the autocompensation quantum key distribution system are presented. The results show the parameters of the energy model of the clock synchronization process in the presence of destabilizing factors in the quantum channel. An experiment was conducted to introduce optical couplers with an atmospheric path into the quantum channel. The possibility of diverting part of the optical radiation from the communication channel during clock synchronization is demonstrated, which can be used by an intruder to interfere with the operation of the quantum key distribution system. The possible data leakage channels in the general structure of quantum cryptographic networks are described.
Keywords: quantum communications, quantum key, photon pulse, detection probability, trusted nodes
For citation:
Plyonkin A. P. Experimental Synchronization of a Quantum Communication System. Doklady Tomskogo gosudarstvennogo universiteta sistem upravleniya i radioelektroniki, 2024, vol. 27, no. 3, pp. 37–41. DOI: 10.21293/1818-0442-2024-27-3-37-41
Authors and copyright holders:
- Plyonkin A. P. , Southern Federal University (Taganrog, Russia)
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