Electron-beam-induced quantum interference effects in a multi-level quantum emitter

• URL: http://arxiv.org/abs/2501.19230v1
• Date: Fri, 31 Jan 2025 15:41:52 GMT
• Title: Electron-beam-induced quantum interference effects in a multi-level quantum emitter
• Authors: H. B. Crispin, N. Talebi,
• Abstract summary: Cathodoluminescence spectroscopy has emerged as a novel platform for nanoscale control of nonclassical features of light. We show that quantum interference can arise between the different relaxation pathways. 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.
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• 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 multi-level 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 multi-level systems.

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