Quantum limit for measurement of a weak classical force coupled to a noisy quantum-mechanical oscillator

Autor:	Latune, C. L., Escher, B. M., Filho, R. L. de Matos, Davidovich, L.
Rok vydání:	2012
Předmět:	Quantum Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.88.042112
Popis:	Precise measurements of tiny forces and displacements play an important role in science and technology. The precision of recent experiments, while beginning to reach the limits imposed by quantum mechanics, is necessarily spoiled by the unavoidable influence of noise. Here we obtain a quantum limit for the uncertainty in the estimation of a resonant classical force acting on a noisy quantum-mechanical oscillator. We determine the best initial state of the oscillator and the best measurement procedure, thus getting a rigorous and useful benchmark for experiments aiming to detect extremely small forces. Comment: Main article: 4.5 pages (including references), 2 figures; Supplemental Material: 5 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1210.3316 Zobrazit plný text záznamu View this record from Arxiv