Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator

We explore the problem of projecting the ground-state of an ultra-strong-coupled circuit-QED system into a non-energy-eigenstate. As a measurement apparatus we consider a nonlinear driven resonator. We find that the post-measurement state of the nonlinear resonator exhibits a large correlation with...

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Autores principales: Endo, Suguru, Matsuzaki, Yuichiro, Kakuyanagi, Kosuke, Saito, Shiro, Lambert, Neill, Nori, Franco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7000414/
https://www.ncbi.nlm.nih.gov/pubmed/32019941
http://dx.doi.org/10.1038/s41598-019-56866-1
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author Endo, Suguru
Matsuzaki, Yuichiro
Kakuyanagi, Kosuke
Saito, Shiro
Lambert, Neill
Nori, Franco
author_facet Endo, Suguru
Matsuzaki, Yuichiro
Kakuyanagi, Kosuke
Saito, Shiro
Lambert, Neill
Nori, Franco
author_sort Endo, Suguru
collection PubMed
description We explore the problem of projecting the ground-state of an ultra-strong-coupled circuit-QED system into a non-energy-eigenstate. As a measurement apparatus we consider a nonlinear driven resonator. We find that the post-measurement state of the nonlinear resonator exhibits a large correlation with the post-measurement state of the ultra-strongly coupled system even when the coupling between measurement device and system is much smaller than the energy scales of the system itself. While the projection is imperfect, we argue that because of the strong nonlinear response of the resonator it works in a practical regime where a linear measurement apparatus would fail.
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spelling pubmed-70004142020-02-11 Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator Endo, Suguru Matsuzaki, Yuichiro Kakuyanagi, Kosuke Saito, Shiro Lambert, Neill Nori, Franco Sci Rep Article We explore the problem of projecting the ground-state of an ultra-strong-coupled circuit-QED system into a non-energy-eigenstate. As a measurement apparatus we consider a nonlinear driven resonator. We find that the post-measurement state of the nonlinear resonator exhibits a large correlation with the post-measurement state of the ultra-strongly coupled system even when the coupling between measurement device and system is much smaller than the energy scales of the system itself. While the projection is imperfect, we argue that because of the strong nonlinear response of the resonator it works in a practical regime where a linear measurement apparatus would fail. Nature Publishing Group UK 2020-02-04 /pmc/articles/PMC7000414/ /pubmed/32019941 http://dx.doi.org/10.1038/s41598-019-56866-1 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Endo, Suguru
Matsuzaki, Yuichiro
Kakuyanagi, Kosuke
Saito, Shiro
Lambert, Neill
Nori, Franco
Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
title Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
title_full Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
title_fullStr Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
title_full_unstemmed Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
title_short Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
title_sort projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7000414/
https://www.ncbi.nlm.nih.gov/pubmed/32019941
http://dx.doi.org/10.1038/s41598-019-56866-1
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