• Open Access

Witnessing nonclassicality through large deviations in quantum optics

Dario Cilluffo, Giuseppe Buonaiuto, Salvatore Lorenzo, G. Massimo Palma, Francesco Ciccarello, Federico Carollo, and Igor Lesanovsky
Phys. Rev. Research 2, 023078 – Published 27 April 2020

Abstract

Nonclassical correlations in quantum optics as resources for quantum computation are important in the quest for highly specialized quantum devices. Here, we put forward a methodology to witness nonclassicality of the output field from a generic quantum optical setup via the statistics of time-integrated photocurrents. Specifically, exploiting the thermodynamics of quantum trajectories, we express a known nonclassicality witness for bosonic fields fully in terms of the source master equation, thus bypassing the explicit calculation of the output light state.

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  • Received 24 September 2019
  • Accepted 20 March 2020

DOI:https://doi.org/10.1103/PhysRevResearch.2.023078

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

General Physics

Authors & Affiliations

Dario Cilluffo1,2,5,*,†, Giuseppe Buonaiuto3,4,5,†, Salvatore Lorenzo1, G. Massimo Palma1,2, Francesco Ciccarello1,2, Federico Carollo3,4,5, and Igor Lesanovsky3,4,5

  • 1Università degli Studi di Palermo, Dipartimento di Fisica e Chimica - Emilio Segrè, Via Archirafi 36, I-90123 Palermo, Italy
  • 2NEST, Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127 Pisa, Italy
  • 3School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
  • 4Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems, University of Nottingham, Nottingham NG7 2RD, United Kingdom
  • 5Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany

  • *Corresponding author: dario.cilluffo@unipa.it
  • These authors contributed equally to the work.

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Vol. 2, Iss. 2 — April - June 2020

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