Influence of detector dead time on the key generation rate in measurement-device-independent quantum key distribution

Experimental technique and devices
Authors:
Shakhovoy Roman A. Dvurechenskiy Anatoly V. Petrov Ivan V. Tumachek Alexander S. Menskoy Daniil D. Gerasin Ilia S. Rudavin Nikita V. Kupriyanov Pavel A.
Abstract:

Single photon detectors are required for registration of qubits in quantum key distribution. Real detectors have non-zero dead time, which leads to a reduction in the key generation rate. In our work, we evaluate the influence of detector dead time on the key generation rate in measurement-device-independent quantum key distribution scheme with 4 detectors. We compare the analytical estimate of the key generation rate in assumption of synchronous dead time and numerical simulations where asynchronous dead time is assumed.