Estimating Quantum and Private capacities of Gaussian channels via degradable extensions
Quantum Physics
2021-12-01 v2
Abstract
We present upper bounds on the quantum and private capacity of single-mode, phase-insentitive Bosonic Gaussian Channels based on degradable extensions. Our findings are state-of-the-art in the following parameter regions: low temperature and high transmissivity for the thermal attenuator, low temperature for additive Gaussian noise, high temperature and intermediate amplification for the thermal amplifier.
Keywords
Cite
@article{arxiv.2103.09569,
title = {Estimating Quantum and Private capacities of Gaussian channels via degradable extensions},
author = {Marco Fanizza and Farzad Kianvash and Vittorio Giovannetti},
journal= {arXiv preprint arXiv:2103.09569},
year = {2021}
}
Comments
5+4 pages, 3 figures. Typos corrected, improved presentation