Probing quantum-coherent dynamics with free electrons

• URL: http://arxiv.org/abs/2512.24883v1
• Date: Wed, 31 Dec 2025 14:24:33 GMT
• Title: Probing quantum-coherent dynamics with free electrons
• Authors: H. B. Crispin, N. Talebi,
• Abstract summary: We develop a quantum theory modeling the dynamics of free electrons interacting with quantum emitters in arbitrary initial states.<n>Our analysis reveals that a free electron can induce transient coherent oscillations in the populations when the system is initially prepared in a coherent superposition of its states.<n>Our findings pave the way for characterization of quantum-coherent dynamics of individual quantum emitters by electron-probes.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Recent advances in time-resolved cathodoluminescence have enabled ultrafast studies of single emitters in quantum materials with femtosecond temporal resolution. Here, we develop a quantum theory modeling the dynamics of free electrons interacting with quantum emitters in arbitrary initial states. Our analysis reveals that a free electron can induce transient coherent oscillations in the populations when the system is initially prepared in a coherent superposition of its states. Moreover, the electron energy spectrum exhibits a clear signature of the quantum coherence and sensitivity to the transition frequency of the emitter. These coherence effects manifest themselves as oscillations in the zero-loss peak of the spectral energy-loss probability. Our findings pave the way for characterization of quantum-coherent dynamics of individual quantum emitters by electron-probes.

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