# Revisiting the dynamics of a charged spinning body in curved spacetime

Source: [Revisiting the dynamics of a charged spinning body in curved spacetime](<https://www.sota2.com/research/paper/68fa496b1e209131ce936f9f>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T07:20:38.619Z

Authors: K. Andrzejewski

Published: 2024-05-22T16:10:44.000Z

## Abstract

We analyse the motion of the spinning body (in the pole-dipole approximation) in the gravitational and electromagnetic fields described by the Mathisson-Papapetrou-Dixon-Souriau equations. First, we define a novel spin condition for the body with the magnetic dipole moment proportional to spin, which generalizes the one proposed by Ohashi-Kyrian-Semer\\'ak for gravity. As a result, we get the whole family of charged spinning particle models in the curved spacetime with remarkably simple dynamics (momentum and velocity are parallel). Applying the reparametrization procedure, for a specific dipole moment, we obtain equations of motion with constant mass and gyromagnetic factor. Next, we show that these equations follow from an effective Hamiltonian formalism, previously interpreted as a classical model of the charged Dirac particle.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2405.13784>)

[PDF](<https://arxiv.org/pdf/2405.13784.pdf>)