Quantum paradigm of the foldover magnetic resonance

Abstract The explosive development of quantum magnonics requires the consideration of several previously known effects from a new angle. In particular, taking into account the quantum behavior of magnons is essential at high excitations of the magnetic system, under the conditions of the so-called p...

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Autores principales:	Yu. M. Bunkov, A. N. Kuzmichev, T. R. Safin, P. M. Vetoshko, V. I. Belotelov, M. S. Tagirov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7e003b21f1c64481b7dd3b08998d0c31
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spelling	oai:doaj.org-article:7e003b21f1c64481b7dd3b08998d0c312021-12-02T14:26:07ZQuantum paradigm of the foldover magnetic resonance10.1038/s41598-021-87196-w2045-2322https://doaj.org/article/7e003b21f1c64481b7dd3b08998d0c312021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87196-whttps://doaj.org/toc/2045-2322Abstract The explosive development of quantum magnonics requires the consideration of several previously known effects from a new angle. In particular, taking into account the quantum behavior of magnons is essential at high excitations of the magnetic system, under the conditions of the so-called phenomenon of “foldover” (bi-stable) magnetic resonance. Previously, this effect was considered in the quasi-classical macrospin approximation. However, at large angles of magnetization precession, the magnon density exceeds the critical value for the formation of a magnon Bose condensate (mBEC). Naturally, this purely quantum phenomenon does not exist in the classical approximation. In addition, mBEC leads to superfluid transfer of magnetization, which suppresses the macroinhomogeneity of the samples. The experiments presented in the article show that quantum phenomena well describes the experimental results of nonlinear magnetic resonance in yttrium iron garnet. Thus, we remove the questions that arose earlier when considering this effect without taking into account quantum phenomena. This discovery paves the way for many quantum applications of supermagnonics, such as the magnetic Josephson effect, long-range spin transport, Q-bits, quantum logic, magnetic sensors, and others.Yu. M. BunkovA. N. KuzmichevT. R. SafinP. M. VetoshkoV. I. BelotelovM. S. TagirovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yu. M. Bunkov A. N. Kuzmichev T. R. Safin P. M. Vetoshko V. I. Belotelov M. S. Tagirov Quantum paradigm of the foldover magnetic resonance
description	Abstract The explosive development of quantum magnonics requires the consideration of several previously known effects from a new angle. In particular, taking into account the quantum behavior of magnons is essential at high excitations of the magnetic system, under the conditions of the so-called phenomenon of “foldover” (bi-stable) magnetic resonance. Previously, this effect was considered in the quasi-classical macrospin approximation. However, at large angles of magnetization precession, the magnon density exceeds the critical value for the formation of a magnon Bose condensate (mBEC). Naturally, this purely quantum phenomenon does not exist in the classical approximation. In addition, mBEC leads to superfluid transfer of magnetization, which suppresses the macroinhomogeneity of the samples. The experiments presented in the article show that quantum phenomena well describes the experimental results of nonlinear magnetic resonance in yttrium iron garnet. Thus, we remove the questions that arose earlier when considering this effect without taking into account quantum phenomena. This discovery paves the way for many quantum applications of supermagnonics, such as the magnetic Josephson effect, long-range spin transport, Q-bits, quantum logic, magnetic sensors, and others.
format	article
author	Yu. M. Bunkov A. N. Kuzmichev T. R. Safin P. M. Vetoshko V. I. Belotelov M. S. Tagirov
author_facet	Yu. M. Bunkov A. N. Kuzmichev T. R. Safin P. M. Vetoshko V. I. Belotelov M. S. Tagirov
author_sort	Yu. M. Bunkov
title	Quantum paradigm of the foldover magnetic resonance
title_short	Quantum paradigm of the foldover magnetic resonance
title_full	Quantum paradigm of the foldover magnetic resonance
title_fullStr	Quantum paradigm of the foldover magnetic resonance
title_full_unstemmed	Quantum paradigm of the foldover magnetic resonance
title_sort	quantum paradigm of the foldover magnetic resonance
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7e003b21f1c64481b7dd3b08998d0c31
work_keys_str_mv	AT yumbunkov quantumparadigmofthefoldovermagneticresonance AT ankuzmichev quantumparadigmofthefoldovermagneticresonance AT trsafin quantumparadigmofthefoldovermagneticresonance AT pmvetoshko quantumparadigmofthefoldovermagneticresonance AT vibelotelov quantumparadigmofthefoldovermagneticresonance AT mstagirov quantumparadigmofthefoldovermagneticresonance
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Quantum paradigm of the foldover magnetic resonance

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