Generalized constraints on quantum amplification
Mesoscale and Nanoscale Physics
2009-11-10 v1 Quantum Physics
Abstract
We derive quantum constraints on the minimal amount of noise added in linear amplification involving input or output signals whose component operators do not necessarily have c-number commutators, as is the case for fermion currents. This is a generalization of constraints derived for the amplification of bosonic fields whose components posses c-number commutators.
Keywords
Cite
@article{arxiv.cond-mat/0407415,
title = {Generalized constraints on quantum amplification},
author = {U. Gavish and B. Yurke and Y. Imry},
journal= {arXiv preprint arXiv:cond-mat/0407415},
year = {2009}
}
Comments
4 pages, 1 figure, submitted to Physical Review Letters