Trinity of Carrollian Gravity: Dynamically Equivalent Formulations of Magnetic Carrollian Gravity

@misc{ahmadijahmani2026trinity,
  title = {{Trinity of Carrollian Gravity: Dynamically Equivalent Formulations of Magnetic Carrollian Gravity}},
  author = {Mehdi Ahmadi-Jahmani and Aliasghar Parvizi},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.01976},
  eprint = {2610.01976},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.01976},
}

TY  - UNPB
TI  - Trinity of Carrollian Gravity: Dynamically Equivalent Formulations of Magnetic Carrollian Gravity
AU  - Mehdi Ahmadi-Jahmani
AU  - Aliasghar Parvizi
PY  - 2026
DA  - 2026/10/01
PB  - arXiv
DO  - 10.48550/arxiv.2610.01976
UR  - https://arxiv.org/abs/2610.01976
AB  - In this paper, we extend the paradigm of the Geometrical Trinity of Gravity to the Carrollian geometry to construct a comprehensive framework of dynamically equivalent theories for Magnetic Carrollian gravity. Utilizing the inherent ambiguities and freedoms of affine connections on degenerate metrics, we systematically relax the metric-compatibility and zero-torsion constraints of the rigid magnetic sector. By imposing global flatness on these modified connections, we prove that the curvature of a Magnetic Carrollian universe can be dynamically traded for isolated kinetic energy densities of torsion and non-metricity. Unlike the Lorentzian Trinity which maps gravity to alternative gravitational frameworks, the Carrollian equivalences can also map spacetime geometry to non-gravitational theories. Specifically, we demonstrate that intrinsic torsion recovers Electric Carrollian gravity as the Teleparallel equivalent of Magnetic Carroll gravity; purely spatial torsion reproduces kinetic terms stracturally similar to the magnetic Hamiltonian of scalar-charge Fracton gauge theory; and temporal torsion sectors map independently to U(1) Maxwell electric fields and Carroll-Weyl conformal dilaton theories. Finally, by formulating a Symmetric Teleparallel Carroll connection with minimal non-metricity, we show that the Magnetic Carrollian Lagrangian is dynamically equivalent to an ultralocal, isotropic Electric Carrollian gravity upon exploiting the present freedoms in connection. These results establish a geometric dictionary translating Carrollian gravitational dynamics into the language of tensor gauge theories, electromagnetism, and dilaton theory.
ER  -