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Type: Journal article
Title: Manifestation of the coupling phase in microwave cavity magnonics
Author: Gardin, A.
Bourhill, J.
Vlaminck, V.
Person, C.
Fumeaux, C.
Castel, V.
Tettamanzi, G.C.
Citation: Physical Review Applied, 2023; 19(5):054069-1-054069-15
Publisher: American Physical Society
Issue Date: 2023
ISSN: 2331-7019
Statement of
Alan Gardin, Jeremy Bourhill, Vincent Vlaminck, Christian Person, Christophe Fumeaux, Vincent Castel, and Giuseppe C. Tettamanzi
Abstract: The interaction between microwave photons and magnons is well understood and originates from the Zeeman coupling between spins and a magnetic field. Interestingly, the magnon-photon interaction is accompanied by a phase factor, which can usually be neglected. However, under the rotating wave approximation, if two magnon modes simultaneously couple with two cavity resonances, this phase cannot be ignored as it changes the physics of the system. We consider two such systems, each differing by the sign of one of the magnon-photon coupling strengths. This simple difference, originating from the various coupling phases in the system, is shown to preserve, or destroy, two potential applications of hybrid photon-magnon systems, namely dark-mode memories and cavity-mediated coupling. The observable consequences of the coupling phase in this system is akin to the manifestation of a discrete Pancharatnam-Berry phase, which may be useful for quantum information processing and the creation of nonreciprocal devices using proper cavity engineering.
Keywords: quant-ph
Rights: © 2023 American Physical Society
DOI: 10.1103/PhysRevApplied.19.054069
Appears in Collections:Chemistry and Physics publications

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