A relativistic QFT description for the interaction of a spin with a magnetic field

• URL: http://arxiv.org/abs/2411.14523v2
• Date: Sun, 04 May 2025 15:27:07 GMT
• Title: A relativistic QFT description for the interaction of a spin with a magnetic field
• Authors: Ruhi Shah, Eduardo Martín-Martínez, T. Rick Perche,
• Abstract summary: We analyze how non-relativistic effective models for the magnetic coupling of a spin to the electromagnetic field emerge.<n>This allows us to keep track of relativistic corrections to the models commonly used in experimental spin physics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We analyze how non-relativistic effective models for the magnetic coupling of a spin to the electromagnetic field (proportional to $\hat{\boldsymbol{\sigma}}\cdot \boldsymbol{B}$) emerge from a full quantum field theoretical description of charged fermionic fields with the quantum electromagnetic field. This allows us to keep track of relativistic corrections to the models commonly used in experimental spin physics. We discuss how this interaction compares to the usual simplified models used in relativistic quantum information.

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