Work

Cavity-magnon-polariton spectroscopy of strongly hybridized electro-nuclear spin excitations in LiHoF4

Year: 2024

Type: article

Abstract: We first present a formalism that incorporates the input-output formalism and the linear response theory to employ cavity-magnon-polariton coupling as a spectroscopic tool for investigating strongly hybridized electro-nuclear spin excitations. A microscopic relation between the generalized susceptibility and the scattering parameter $$|S_{11}|$$ | S 11 | in strongly hybridized cavity-magnon-polariton systems has been derived without resorting to semi-classical approximations. The formalism is then applied to both analyze and simulate a specific systems comprising a model quantum Ising magnet ( $$\hbox {LiHoF}_4$$ LiHoF 4 ) and a high-finesse 3D re-entrant cavity resonator. Quantitative information on the electro-nuclear spin states in $$\hbox {LiHoF}_4$$ LiHoF 4 is extracted, and the experimental observations across a broad parameter range were numerically reproduced, including an external magnetic field traversing a quantum critical point. The method potentially opens a new avenue not only for further studies on the quantum phase transition in $$\hbox {LiHoF}_4$$ LiHoF 4 but also for a wide range of complex magnetic systems.

Source: Scientific Reports

DOI: 10.1038/s41598-024-75978-x

Authors: Yikai Yang, Peter Babkevich, Richard Gaal, Ivica Živković, Henrik M. Rønnow

Institutions: University of Oxford, École Polytechnique Fédérale de Lausanne

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,590

Funders: National Science Foundation, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Horizon 2020 Framework Programme