We propose a method to improve the performance of two entanglement-based continuous-variable quantum key distribution protocols using noiseless linear amplifiers. The two entanglement-based schemes consist of an entanglement distribution protocol with an untrusted source and an entanglement swapping protocol with an untrusted relay. Simulation results show that the noiseless linear amplifiers can improve the performance of these two protocols, in terms of maximal transmission distances, when we consider small amounts of entanglement, as typical in realistic setups.
@article{arxiv.1507.00155,
title = {Noiseless Linear Amplifiers in Entanglement-Based Continuous-Variable Quantum Key Distribution},
author = {Yi-Chen Zhang and Zhengyu Li and Christian Weedbrook and Kevin Marshall and Stefano Pirandola and Song Yu and Hong Guo},
journal= {arXiv preprint arXiv:1507.00155},
year = {2015}
}