Generalized constraints on quantum amplification

Details Generalized constraints on quantum amplification Generalized constraints on quantum amplification

2004-07-16

arxiv.org/abs/cond-mat/0407415v1

Phys. Rev. Lett. 93, 250601 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.93.250601

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.

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