Entanglement in Elastic Electron Scattering: Perturbation theory misses fundamental aspects of Bragg scattering

• URL: http://arxiv.org/abs/2508.01383v1
• Date: Sat, 02 Aug 2025 14:26:05 GMT
• Title: Entanglement in Elastic Electron Scattering: Perturbation theory misses fundamental aspects of Bragg scattering
• Authors: Stefan Löffler, Peter Schattschneider,
• Abstract summary: Elastic electron scattering is one of the primary means of investigating materials on the atomic scale.<n>We show that the interaction of the probe beam and the sample results in entanglement between the two systems.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Elastic electron scattering is one of the primary means of investigating materials on the atomic scale. It is usually described by modeling the sample as a fixed, static, perturbative potential, thereby completely neglecting the quantum nature of the atoms inside. In this work, we present a quantum treatment of elastic electron scattering. We show that the interaction of the probe beam and the sample results in entanglement between the two systems, which can have far-reaching consequences, particularly on coherence and image contrast. As a timely example, we discuss decoherence in Bragg scattering on nanoparticles. We also investigate under which conditions the conventional scattering theory is recovered.

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