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Electron-beam-induced quantum interference effects in a multilevel quantum emitter

H. B. Crispin* and N. Talebi†

  • *Contact author: crispin@physik.uni-kiel.de
  • †Contact author: talebi@physik.uni-kiel.de

Phys. Rev. B 112, 045419 – Published 17 July, 2025

DOI: https://doi.org/10.1103/xtgl-vccr

Abstract

Cathodoluminescence spectroscopy has recently emerged as a novel platform for nanoscale control of nonclassical features of light. Here, we propose a theoretical model for cathodoluminescence from a multilevel quantum emitter. Employing a master equation approach and treating the electron-beam excitation as an incoherent broadband field source, we show that quantum interference can arise between the different relaxation pathways. The induced interference can significantly modify the time-dependent spectra resulting in the enhancement or suppression of cathodoluminescence. We find that the excitation rate, initial state of the emitter, and excited level spacing play a crucial role in determining the influence of interference. Our findings shed light on electron-beam-induced quantum interference in cathodoluminescence and provides a theoretical basis for exploring quantum optical phenomena in electron-driven multilevel systems.

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