Non-Classicality Criteria in Multi-port Interferometry

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Title: Non-Classicality Criteria in Multi-port Interferometry
Authors: Rigovacca, L
Franco, CD
Metcalf, BJ
Walmsley, IA
Kim, MS
Item Type: Journal Article
Abstract: Quantum interference lies at the basis of fundamental differences between quantum and classical behaviors. It is thus crucial to understand the boundaries between what interference patterns can be described by classical wave mechanics and what, on the other hand, can only be understood with a proper quantum mechanical description. While a lot of work has already been done for the simple case of two-mode interference, the multi-mode case has not been fully explored yet. Here we derive bounds for classical models of light fields in a general scenario of intensity interferometry, and we show how they can be violated in a quantum framework. As a consequence, this violation acts as a non-classicality witness, able to detect the presence of sources with sub-Poissonian photon-number statistics. We also derive a criterion for certifying the indivisibility of a quantum interferometer and obtain a method to simultaneously measure the average pairwise distinguishability of the input sources.
Issue Date: 16-Nov-2016
Date of Acceptance: 4-Oct-2016
ISSN: 1079-7114
Publisher: American Physical Society
Journal / Book Title: Physical Review Letters
Volume: 117
Copyright Statement: © 2016 The Authors. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Sponsor/Funder: Commission of the European Communities
Engineering & Physical Science Research Council (E
Funder's Grant Number: 317232
Keywords: quant-ph
General Physics
02 Physical Sciences
Notes: 4 + 8 pages
Publication Status: Published
Article Number: 213602
Appears in Collections:Quantum Optics and Laser Science
Faculty of Natural Sciences

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