Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics

Abstract We show that Fano interference can be realized in a macroscopic microwave cavity coupled to a spin ensemble at room temperature. Via a formalism developed from the linearized Jaynes-Cummings model of cavity electromagnonics, we show that generalized Fano interference emerges from the photon...

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Autores principales:	Jakob Gollwitzer, Lars Bocklage, Ralf Röhlsberger, Guido Meier
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/8833e96ab6e94628a4124d50f22fef74
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spelling	oai:doaj.org-article:8833e96ab6e94628a4124d50f22fef742021-12-02T16:50:23ZConnecting Fano interference and the Jaynes-Cummings model in cavity magnonics10.1038/s41534-021-00445-82056-6387https://doaj.org/article/8833e96ab6e94628a4124d50f22fef742021-07-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00445-8https://doaj.org/toc/2056-6387Abstract We show that Fano interference can be realized in a macroscopic microwave cavity coupled to a spin ensemble at room temperature. Via a formalism developed from the linearized Jaynes-Cummings model of cavity electromagnonics, we show that generalized Fano interference emerges from the photon–magnon interaction at low cooperativity. In this regime, the reflectivity approximates the scattering cross-section derived from the Fano-Anderson model. Although asymmetric lineshapes in this system are often associated with the Fano formalism, we show that whilst Fano interference is actually present, an exact Fano form cannot be achieved from the linear Jaynes-Cummings model. In the Fano model an additional contribution arises, which is attributed to decoherence in other systems, and in this case is due to the resonant nature of the photonic mode. The formalism is experimentally verified and accounts for the asymmetric lineshapes arising from the interaction between magnon and photon channels. As the magnon–photon coupling strength is increased, these channels merge into hybridized magnon–photon modes and the generalized Fano interference picture breaks down. Our results are universally applicable to systems underlying the linearized Jaynes-Cummings Hamiltonian at low cooperativity and connect the microscopic parameters of the quantum optical model to generalized Fano lineshapes.Jakob GollwitzerLars BocklageRalf RöhlsbergerGuido MeierNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Jakob Gollwitzer Lars Bocklage Ralf Röhlsberger Guido Meier Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics
description	Abstract We show that Fano interference can be realized in a macroscopic microwave cavity coupled to a spin ensemble at room temperature. Via a formalism developed from the linearized Jaynes-Cummings model of cavity electromagnonics, we show that generalized Fano interference emerges from the photon–magnon interaction at low cooperativity. In this regime, the reflectivity approximates the scattering cross-section derived from the Fano-Anderson model. Although asymmetric lineshapes in this system are often associated with the Fano formalism, we show that whilst Fano interference is actually present, an exact Fano form cannot be achieved from the linear Jaynes-Cummings model. In the Fano model an additional contribution arises, which is attributed to decoherence in other systems, and in this case is due to the resonant nature of the photonic mode. The formalism is experimentally verified and accounts for the asymmetric lineshapes arising from the interaction between magnon and photon channels. As the magnon–photon coupling strength is increased, these channels merge into hybridized magnon–photon modes and the generalized Fano interference picture breaks down. Our results are universally applicable to systems underlying the linearized Jaynes-Cummings Hamiltonian at low cooperativity and connect the microscopic parameters of the quantum optical model to generalized Fano lineshapes.
format	article
author	Jakob Gollwitzer Lars Bocklage Ralf Röhlsberger Guido Meier
author_facet	Jakob Gollwitzer Lars Bocklage Ralf Röhlsberger Guido Meier
author_sort	Jakob Gollwitzer
title	Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics
title_short	Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics
title_full	Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics
title_fullStr	Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics
title_full_unstemmed	Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics
title_sort	connecting fano interference and the jaynes-cummings model in cavity magnonics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8833e96ab6e94628a4124d50f22fef74
work_keys_str_mv	AT jakobgollwitzer connectingfanointerferenceandthejaynescummingsmodelincavitymagnonics AT larsbocklage connectingfanointerferenceandthejaynescummingsmodelincavitymagnonics AT ralfrohlsberger connectingfanointerferenceandthejaynescummingsmodelincavitymagnonics AT guidomeier connectingfanointerferenceandthejaynescummingsmodelincavitymagnonics
_version_	1718383049995976704

Connecting Fano interference and the Jaynes-Cummings model in cavity magnonics

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