Impact of Shot Noise Estimation on the Secret Key Rate of a CV-QKD System

• Daniel Pereira University of Aveiro
• Nuno A. Silva University of Aveiro
• Armando N. Pinto University of Aveiro

DOI: https://doi.org/10.5753/wquantum.2022.223559

Resumo

In this work we present the impact of the uncertainty of the shot noise estimate on the performance of a continuous variables quantum key distribution system using a probabilistically shaped 128-APSK constellation. We demonstrate that the performance of the system is greatly degraded by the uncertainty of the shot noise estimate, with a total loss of security being possible.

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