The discrete sampling variation measurement

Citation
Sl. Danilishin et al., The discrete sampling variation measurement, PHYS LETT A, 278(3), 2000, pp. 123-128
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
0375-9601 → ACNP
Volume
278
Issue
3
Year of publication
2000
Pages
123 - 128
Database
ISI
SICI code
0375-9601(200012)278:3<123:TDSVM>2.0.ZU;2-E
Abstract
The modification of the variation quantum measurement is considered, which allows to eliminate the main shortcoming of such a measurement - the meter hardware setup dependence on the signal shape and arrival time. This method is based on approximation of the signal by series of short rectangular "sl ices" and periodical applying the Variation measurement procedure fitted to such a rectangular pulse. It allows to reconstruct the signal shape with p recision not limited by the standard quantum limit. "Price", in the case of the parametric position meters (including interferometric ones), is pumpin g energy 720/pi (4) approximate to 7.4 times higher than for the usual vari ation measurement. (C) 2000 Elsevier Science B.V. All rights reserved.