Reference Clock Signal Distribution for Quantum Key Distribution

  • Mariana F. Ramos Instituto de Telecomunicações / Universidade de Aveiro
  • Nuno A. Silva Instituto de Telecomunicações
  • Nelson J. Muga Instituto de Telecomunicações
  • Armando N. Pinto Instituto de Telecomunicações / Universidade de Aveiro


Quantum key distribution (QKD) requires high synchronization accuracy, specially in systems that use gated detectors at the receiver station. In this work, we present a reference clock distribution method to support long-term QKD. An average quantum bit error rate (QBER) of 1.8% was measured, which is suitable for different QKD implementations. This method is suitable for longdistance and long-term QKD implementations and does not require additional transmitted qubits for synchronization.


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RAMOS, Mariana F.; SILVA, Nuno A.; MUGA, Nelson J.; PINTO, Armando N.. Reference Clock Signal Distribution for Quantum Key Distribution. In: WORKSHOP DE COMUNICAÇÃO E COMPUTAÇÃO QUÂNTICA (WQUANTUM), 1. , 2021, Uberlândia. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2021 . p. 31-36. DOI: