Heisenberg constraints on mesoscopic and molecular amplifiers
arXiv:cond-mat/0407544
Abstract
Heisenberg uncertainty relations for current components impose constraints on the performance of linear amplifiers. Here we derive such constraints for amplifiers in which the input signal modulates a bias current in order to produce an amplified output. These amplifiers include transistors, macroscopic, mesoscopic, or molecular, operated as linear amplifiers.
4 pages. To appear in the Proceddings of Rencontres de Moriond on Quantum Information and Decoherence in Nanosystems, January 2004