A macrorealistic test in hybrid quantum optomechanics

Marta Marchese; Hannah McAleese; Angelo Bassi; Mauro Paternostro

doi:10.1088/1361-6455/ab6d18

A macrorealistic test in hybrid quantum optomechanics

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

^*Corresponding author for this work

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

71 Downloads (Pure)

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 language	English
Article number	075401
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	53
Issue number	7
DOIs	https://doi.org/10.1088/1361-6455/ab6d18
Publication status	Published - 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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10.1088/1361-6455/ab6d18Licence: CC BY

A macrorealistic test in hybrid quantum optomechanics
Copyright 2020 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 1.26 MBLicence: CC BY

Enforcing nonclassicality in medium-scale quantum systems
McAleese, H. (Author), Paternostro, M. (Supervisor) & Ferraro, A. (Supervisor), Jul 2022
Student thesis: Doctoral Thesis › Doctor of Philosophy

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Cite this

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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.",

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AU - Marchese, Marta

AU - McAleese, Hannah

AU - Bassi, Angelo

AU - Paternostro, Mauro

PY - 2020/3/9

Y1 - 2020/3/9

N2 - 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.

AB - 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.

KW - foundations

KW - Leggett-Garg

KW - optomechanics

KW - temporal correlations

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A macrorealistic test in hybrid quantum optomechanics

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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Student theses

Enforcing nonclassicality in medium-scale quantum systems

Cite this