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Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit

We report measurements made at millikelvin temperatures of a superconducting coplanar waveguide resonator (CPWR) coupled to a sphere of yttrium-iron garnet. Systems hybridising collective spin excitations with microwave photons have recently attracted interest for their potential quantum information...

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Autores principales: Morris, R. G. E., van Loo, A. F., Kosen, S., Karenowska, A. D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5599648/
https://www.ncbi.nlm.nih.gov/pubmed/28912482
http://dx.doi.org/10.1038/s41598-017-11835-4
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author Morris, R. G. E.
van Loo, A. F.
Kosen, S.
Karenowska, A. D.
author_facet Morris, R. G. E.
van Loo, A. F.
Kosen, S.
Karenowska, A. D.
author_sort Morris, R. G. E.
collection PubMed
description We report measurements made at millikelvin temperatures of a superconducting coplanar waveguide resonator (CPWR) coupled to a sphere of yttrium-iron garnet. Systems hybridising collective spin excitations with microwave photons have recently attracted interest for their potential quantum information applications. In this experiment the non-uniform microwave field of the CPWR allows coupling to be achieved to many different magnon modes in the sphere. Calculations of the relative coupling strength of different mode families in the sphere to the CPWR are used to successfully identify the magnon modes and their frequencies. The measurements are extended to the quantum limit by reducing the drive power until, on average, less than one photon is present in the CPWR. Investigating the time-dependent response of the system to square pulses, oscillations in the output signal at the mode splitting frequency are observed. These results demonstrate the feasibility of future experiments combining magnonic elements with planar superconducting quantum devices.
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spelling pubmed-55996482017-09-15 Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit Morris, R. G. E. van Loo, A. F. Kosen, S. Karenowska, A. D. Sci Rep Article We report measurements made at millikelvin temperatures of a superconducting coplanar waveguide resonator (CPWR) coupled to a sphere of yttrium-iron garnet. Systems hybridising collective spin excitations with microwave photons have recently attracted interest for their potential quantum information applications. In this experiment the non-uniform microwave field of the CPWR allows coupling to be achieved to many different magnon modes in the sphere. Calculations of the relative coupling strength of different mode families in the sphere to the CPWR are used to successfully identify the magnon modes and their frequencies. The measurements are extended to the quantum limit by reducing the drive power until, on average, less than one photon is present in the CPWR. Investigating the time-dependent response of the system to square pulses, oscillations in the output signal at the mode splitting frequency are observed. These results demonstrate the feasibility of future experiments combining magnonic elements with planar superconducting quantum devices. Nature Publishing Group UK 2017-09-14 /pmc/articles/PMC5599648/ /pubmed/28912482 http://dx.doi.org/10.1038/s41598-017-11835-4 Text en © The Author(s) 2017 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
Morris, R. G. E.
van Loo, A. F.
Kosen, S.
Karenowska, A. D.
Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit
title Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit
title_full Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit
title_fullStr Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit
title_full_unstemmed Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit
title_short Strong coupling of magnons in a YIG sphere to photons in a planar superconducting resonator in the quantum limit
title_sort strong coupling of magnons in a yig sphere to photons in a planar superconducting resonator in the quantum limit
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5599648/
https://www.ncbi.nlm.nih.gov/pubmed/28912482
http://dx.doi.org/10.1038/s41598-017-11835-4
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