Witnessing genuine multi-photon indistinguishability

Bosonic interference is a fundamental physical phenomenon, and it is believed to lie at the heart of quantum computational advantage. It is thus necessary to develop practical tools to witness its presence, both for a reliable assessment of a quantum source and for fundamental investigations. Here w...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2018-04
Main Authors: Brod, Daniel J, Galvão, Ernesto F, Viggianiello, Niko, Flamini, Fulvio, Spagnolo, Nicolò, Sciarrino, Fabio
Format: Article
Language:English
Subjects:
Interferometers
Photonics
Set theory
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Bosonic interference is a fundamental physical phenomenon, and it is believed to lie at the heart of quantum computational advantage. It is thus necessary to develop practical tools to witness its presence, both for a reliable assessment of a quantum source and for fundamental investigations. Here we describe how linear interferometers can be used to unambiguously witness genuine n-boson indistinguishability. The amount of violation of the proposed witnesses bounds the degree of multi-boson indistinguishability, for which we also provide a novel intuitive model using set theory. We experimentally implement this test to bound the degree of 3-photon indistinguishability in states we prepare using parametric down-conversion. Our approach results in a convenient tool for practical photonic applications, and may inspire further fundamental advances based on the operational framework we adopt.
ISSN:2331-8422
DOI:10.48550/arxiv.1804.01334