Quantum key distribution with multiphoton pulses: An advantage
Abstract
In this article, we introduce a quantum key distribution protocol for the line of sight channels based on coincidence measurements. We present a proof-of-concept implementation of our protocol. We show that using coincidence measurements to monitor multi-photon pulses results in a higher secure key rate over longer distances for such channels. This key rate is higher than popular implementations of quantum key distribution protocol based on BB84, for example, the GLLP analysis [Quant. Info. Comput. \textbf{4}, 325 (2004)]. In the experiment, we could generate around more key bits per signal pulse as compared to the GLLP analysis of BB84 protocol with similar parameters and equal value of mean photon number.
Cite
@article{arxiv.2008.07166,
title = {Quantum key distribution with multiphoton pulses: An advantage},
author = {Ayan Biswas and Anindya Banerji and Nijil Lal and Pooja Chandravanshi and Rupesh Kumar and Ravindra P. Singh},
journal= {arXiv preprint arXiv:2008.07166},
year = {2021}
}
Comments
12 pages, 4 figures and 3 tables. Final accepted version (Accepted for publication in OSA Continuum)