Quantum Secrecy in Thermal States
Quantum Physics
2018-08-14 v3
Abstract
We propose to perform quantum key distribution using quantum correlations occurring within thermal states produced by low power sources such as LED's. These correlations are exploited through the Hanbury Brown and Twiss effect. We build an optical central broadcast protocol using a superluminescent diode which allows switching between laser and thermal regimes, enabling us to provide experimental key rates in both regimes. We provide a theoretical analysis and show that quantum secrecy is possible, even in high noise situations.
Cite
@article{arxiv.1711.06592,
title = {Quantum Secrecy in Thermal States},
author = {Elizabeth Newton and Anne Ghesquière and Freya L. Wilson and Benjamin T. H. Varcoe and Martin Moseley},
journal= {arXiv preprint arXiv:1711.06592},
year = {2018}
}
Comments
This version includes revisions prompted by referees comments, and some other small editorial comments