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Heitler effect and resonance fluorescence in quantum magnonics

Enes Ilbuğa1, V. V. Dobrovitski1,2, and Ya. M. Blanter1

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Phys. Rev. B 114, 074434 – Published 26 August, 2026

DOI: https://doi.org/10.1103/6cnw-7j94

Abstract

We consider a coupled system of a qubit and a magnon mode in which the qubit is weakly driven. We demonstrate that the spectral steady-state responses of both the qubit and the magnon show, in addition to two sidebands split by the coupling, also a peak at the driving frequency with virtually zero linewidth. This phenomenon, which persists at both strong and weak coupling, is an analog of the Heitler effect in atomic physics and shows the path towards building of coherent magnon sources.

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Outline

Information

Phys. Rev. B 114, 074434– Published 26 August, 2026
  • Received 13 February 2025
  • Revised 3 July 2026
  • Accepted 21 July 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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