Distributed Quantum Metrology with a Single Squeezed-Vacuum Source
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Authors
Gatto, Dario
Facchi, Paolo
Narducci, Frank
Tamma, Vincenzo
Subjects
Advisors
Date of Issue
2019-07-01
Date
July 1, 2019
Publisher
ArXiv
Language
Abstract
We propose an interferometric scheme for the estimation of a linear combination with non-negative
weights of an arbitrary number M > 1 of unknown phase delays, distributed across an M-channel
linear optical network, with Heisenberg-limited sensitivity. This is achieved without the need of
any sources of photon-number or entangled states, photon-number resolving detectors or auxiliary
interferometric channels. Indeed, the proposed protocol remarkably relys upon a single squeezed state source, an antisqueezing operation at the interferometer output, and on-off photodectors.
Type
Preprint
Description
Series/Report No
Department
Physics
Organization
Identifiers
NPS Report Number
Sponsors
Office of Naval Research Global (N62909-418-1-2153)
Istituto Nazionale di Fisica Nucleare (INFN) through the project “QUANTUM”
University of Portsmouth
Italian National Group of Mathematical Physics (GNFM-INdAM)
Istituto Nazionale di Fisica Nucleare (INFN) through the project “QUANTUM”
University of Portsmouth
Italian National Group of Mathematical Physics (GNFM-INdAM)
Funding
Format
8 p.
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.