Theory of the magnon Purcell effect in a cavity magnonic system
Phys. Rev. B 111, 214428 – Published 18 June, 2025
DOI: https://doi.org/10.1103/9jw6-w9lw
Abstract
We present a systematic analysis of cavity effects on the decay dynamics of an open magnonic system. The Purcell effect on the magnon oscillator decay is thoroughly examined for both driven and nondriven scenarios with realistic parameters and initial conditions. Analytical conditions are determined to distinguish between strong and weak coupling regimes, corresponding to oscillatory and pure decay behaviors, respectively. Additionally, our theory predicts the decay of the photon mode within the cavity-magnonic open system, demonstrating excellent agreement with existing experimental data. Our findings and methodologies provide valuable insights for advancing research in cavity magnonic quantum control, quantum information processing, and the development of magnonic quantum devices.
