Abstract
We discuss various microscopic mechanisms for level attraction in a hybridized magnon-photon system of a ferromagnet in a microwave cavity. The discussion is based upon the electromagnetic theory of continuous media where the effects of the internal magnetization dynamics of the ferromagnet are described using dynamical response functions. This approach is in agreement with quantized multi-oscillator models of coupled photon-magnon dynamics. We demonstrate that to provide the attractive interaction between the modes, the effective response functions should be diamagnetic. Magneto-optical coupling is found to be one mechanism for the effective diamagnetic response, which is proportional to photon number. A dual mechanism based on the Aharonov–Casher effect is also highlighted, which is instead dependent on magnon number.
Highlights
- The microscopic origin of magnon-photon level attraction by traveling waves: Theory and experiment Bimu Yao et al
The mechanism for level attraction between strongly interacting spin-photon excitations was proposed for a system with two driving terms with a phase offset [32], which was recently realized in a re-entrant cavity resonator using two separate drives [33, 34]
We demonstrate that magneto-optical coupling, or the inverse Faraday effect, provides one possibility for the effective diamagnetic response, which being quantized, leads to a linearized optomagnonic Hamiltonian [15, 16]
Summary
Any further distribution of We discuss various microscopic mechanisms for level attraction in a hybridized magnon-photon this work must maintain system of a ferromagnet in a microwave cavity. The discussion is based upon the electromagnetic attribution to the author(s) and the title of theory of continuous media where the effects of the internal magnetization dynamics of the the work, journal citation and DOI. Ferromagnet are described using dynamical response functions. This approach is in agreement with quantized multi-oscillator models of coupled photon-magnon dynamics. We demonstrate that to provide the attractive interaction between the modes, the effective response functions should be diamagnetic. Magneto-optical coupling is found to be one mechanism for the effective diamagnetic response, which is proportional to photon number.
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