Performance and security of 5 GHz repetition rate polarization-based Quantum Key Distribution
Fadri Gr\"unenfelder (1), Alberto Boaron (1), Davide Rusca (1),, Anthony Martin (1, 2), Hugo Zbinden (1) ((1) Group of Applied Physics, University of Geneva, (2) Universit\'e Cote d'Azur CNRS Institut de Physique, de Nice)
TL;DR
This paper demonstrates a 5 GHz polarization-based quantum key distribution system over 151.5 km of fiber, achieving a key rate of 54.5 kbps, and discusses the effects of high-frequency pulse correlations.
Contribution
It introduces a high-frequency (5 GHz) polarization-based QKD source and analyzes the impact of pulse correlations on security and performance.
Findings
Successful distribution of secret keys over 151.5 km fiber
Achieved key rate of 54.5 kbps at 5 GHz
Identified and discussed pulse correlation effects
Abstract
We present and characterize a source for a 5 GHz clocked polarization-based simplified BB84 protocol. Secret keys are distributed over 151.5 km of standard telecom fiber at a rate of 54.5 kbps. Potentially, an increased clock frequency of the experiment introduces correlations between succeeding pulses. We discuss the impact of these correlations and propose measurements to estimate the relevant parameters.
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