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

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

URL: http://arxiv.org/abs/2411.14523v1
Date: Thu, 21 Nov 2024 19:00:00 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. This allows us to keep track of relativistic corrections to the models commonly used in experimental spin physics.
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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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