Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system

We investigate phonon statistics in a nanomechanical resonator (NAMR), which is quadratically coupled to a two-level system, by driving the NAMR and two-level system simultaneously. We find that unconventional phonon blockade (UCPNB), i.e., strong phonon antibunching effect based on quantum interfer...

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Autores principales: Shi, Hai-Quan, Xu, Xun-Wei, Liu, Nian-Hua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6584673/
https://www.ncbi.nlm.nih.gov/pubmed/31217498
http://dx.doi.org/10.1038/s41598-019-45027-z
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author Shi, Hai-Quan
Xu, Xun-Wei
Liu, Nian-Hua
author_facet Shi, Hai-Quan
Xu, Xun-Wei
Liu, Nian-Hua
author_sort Shi, Hai-Quan
collection PubMed
description We investigate phonon statistics in a nanomechanical resonator (NAMR), which is quadratically coupled to a two-level system, by driving the NAMR and two-level system simultaneously. We find that unconventional phonon blockade (UCPNB), i.e., strong phonon antibunching effect based on quantum interference, can be observed when driven fields are weak. By increasing the strengths of the driving fields, we show the crossover from the UCPNB to the conventional phonon blockade (CPNB), which is induced by the strong nonlinear interaction of the system. Moreover, under the strong coupling condition for CPNB, quantum interference effect can also be used to enhanced the phonon blockade by optimizing the phase difference of the two external driving fields.
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spelling pubmed-65846732019-06-26 Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system Shi, Hai-Quan Xu, Xun-Wei Liu, Nian-Hua Sci Rep Article We investigate phonon statistics in a nanomechanical resonator (NAMR), which is quadratically coupled to a two-level system, by driving the NAMR and two-level system simultaneously. We find that unconventional phonon blockade (UCPNB), i.e., strong phonon antibunching effect based on quantum interference, can be observed when driven fields are weak. By increasing the strengths of the driving fields, we show the crossover from the UCPNB to the conventional phonon blockade (CPNB), which is induced by the strong nonlinear interaction of the system. Moreover, under the strong coupling condition for CPNB, quantum interference effect can also be used to enhanced the phonon blockade by optimizing the phase difference of the two external driving fields. Nature Publishing Group UK 2019-06-19 /pmc/articles/PMC6584673/ /pubmed/31217498 http://dx.doi.org/10.1038/s41598-019-45027-z Text en © The Author(s) 2019 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
Shi, Hai-Quan
Xu, Xun-Wei
Liu, Nian-Hua
Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
title Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
title_full Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
title_fullStr Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
title_full_unstemmed Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
title_short Phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
title_sort phonon blockade in a nanomechanical resonator quadratically coupled to a two-level system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6584673/
https://www.ncbi.nlm.nih.gov/pubmed/31217498
http://dx.doi.org/10.1038/s41598-019-45027-z
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AT xuxunwei phononblockadeinananomechanicalresonatorquadraticallycoupledtoatwolevelsystem
AT liunianhua phononblockadeinananomechanicalresonatorquadraticallycoupledtoatwolevelsystem

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