Quantum entanglement and modulation enhancement of free-electron-bound-electron interaction

• URL: http://arxiv.org/abs/2010.11396v2
• Date: Sat, 20 Nov 2021 18:37:35 GMT
• Title: Quantum entanglement and modulation enhancement of free-electron-bound-electron interaction
• Authors: Zhexin Zhao, Xiao-Qi Sun, and Shanhui Fan
• Abstract summary: We study the dynamics of a free-electron passing by a two-level system fully quantum mechanically. We emphasize the enhancement of interaction from the modulation of the free-electron wave function.
• Score: 0.43012765978447565
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The modulation and engineering of the free-electron wave function bring new ingredients to the electron-matter interaction. We study the dynamics of a free-electron passing by a two-level system fully quantum mechanically and emphasize the enhancement of interaction from the modulation of the free-electron wave function. In presence of modulation of the free-electron wave function, we show that the electron energy loss/gain spectrum is greatly enhanced for a coherent initial state of the two-level system, which can function as a probe of the atomic coherence. We further find that distantly separated two-level atoms can be entangled through interacting with the same free electron. For a dilute beam of modulated electrons interacting with the atom, our theory shows the enhanced interaction due to resonant modulation.

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