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Magnonic Heitler Effect and Coherent Magnon Sources

In a weakly driven qubit coupled to a single magnon mode, the steady-state spectra of both the qubit and the magnon carry a zero-linewidth coherent peak at the drive frequency alongside the coupling-split sidebands - a magnonic analog of the atomic Heitler effect that persists at weak and strong coupling and offers a route to coherent, narrow-linewidth magnon sources.

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Heitler effect and resonance fluorescence in quantum magnonics Enes Ilbu˘ga,1 V. V. Dobrovitski,1

Analyzes a superconducting qubit coupled to a single magnon mode and weakly driven near resonance. Solving for the steady state including dissipation, the authors show the spectra of both the qubit a…