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Proceedings Paper

Overcoming classical measurement limits through photon number correlations: an overview of a few recent results
Author(s): I. Ruo Bechera; A. Meda; I. Degiovanni; G. Brida; M. Genovese
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Paper Abstract

In this proceeding we discuss as quantum correlations can enhance measurements capabilities [1,2,3,6], discussing few examples as target detection in a noisy environment and holometer. The first [2] is a quantum enhanced scheme preserving a strong advantage over classical counterparts even in presence of large amount of noise and losses. Our work, inspired by [3], has been performed exploiting only photon number correlations in twin beams. Thus, for its simplicity it can find widespread use. Even more important by challenging the common believe that real application of quantum technologies is limited by fragility to noise and losses, it paves the way to their real application. Then, we describe as the same kind of correlations can find application in a completely different area of physics, i.e. in testing quantum gravity. Indeed, recently, effects in interferometers connected to noncommutativity of position variables in different directions were considered in two coupled interferometers [5], the ``holometer'' [6]. We show that the use of quantum correlated light beams could lead to significant improvements.

Paper Details

Date Published: 8 October 2014
PDF: 6 pages
Proc. SPIE 9225, Quantum Communications and Quantum Imaging XII, 922502 (8 October 2014); doi: 10.1117/12.2059789
Show Author Affiliations
I. Ruo Bechera, Istituto Nazionale di Ricerca Metrologica (Italy)
A. Meda, Istituto Nazionale di Ricerca Metrologica (Italy)
I. Degiovanni, Istituto Nazionale di Ricerca Metrologica (Italy)
G. Brida, Istituto Nazionale di Ricerca Metrologica (Italy)
M. Genovese, Istituto Nazionale di Ricerca Metrologica (Italy)

Published in SPIE Proceedings Vol. 9225:
Quantum Communications and Quantum Imaging XII
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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