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

Pereira, D. ; Silva, N. A. ; Pinto, A. N.

Impact of Shot Noise Estimation on the Secret Key Rate of a CV-QKD System, Proc SBRC Workshop de Comunicação e Computação Quântica WQuantum, Fortaleza, Brazil, Vol. , pp. - , May, 2022.

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Abstract
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.