A macrorealistic test in hybrid quantum optomechanics

Marta Marchese*, Hannah McAleese, Angelo Bassi, Mauro Paternostro

*Corresponding author for this work

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Abstract

We discuss a scheme for macrorealistic theories of the Leggett-Garg form (Leggett and Garg 1985 Phys. Rev. Lett. 54 857). Our scheme is based on a hybrid optomechanical system. It seems reasonable to test these inequalities with an optomechanical system, since in an optomechanical cavity it is possible to create non-classical states of the mirror through a projective measurement on the cavity field. We will present the protocol to generate such non-classicality for a general optomechanical cavity and after we will carry out a theoretical test for one of the possible formulations of these inequalities using a hybrid optomechanical system. Specifically, the inequality will be investigated for an harmonic oscillator coupled to a two-level system, which replaces the light field of the cavity. The aim is to reproduce, with this system, the evolution of a single spin-1/2 for which the inequality is violated; this is achievable through the conditioning of the two-level system which will be used as an ancilla.

Original languageEnglish
Article number075401
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume53
Issue number7
DOIs
Publication statusPublished - 09 Mar 2020

Bibliographical note

Publisher Copyright:
© 2020 IOP Publishing Ltd.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • foundations
  • Leggett-Garg
  • optomechanics
  • temporal correlations

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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