Gaussian pseudogauge invariant hydrodynamics with spin
High Energy Physics - Theory
2026-04-10 v1 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
Extending the Gaussian covariant hydrodynamics approach [1] using torsion as an auxiliary field we formulate a fluctuating hydrodynamics with spin which is covariant with respect to pseudo-gauge transformations as well as generally covariant with respect to foliations. This is done via the second order gravitational Ward identities, derived here in the torsionful case. This ensures that, while angular momentum observables depend covariantly on the pseudo-gauge, the dynamics is pseudo-gauge independent, thus clarifying the role of the pseudo-gauge in hydrodynamics with spin
Cite
@article{arxiv.2604.07657,
title = {Gaussian pseudogauge invariant hydrodynamics with spin},
author = {David Montenegro and Mariana Julia Pereira Dos Dores Savioli and Giorgio Torrieri},
journal= {arXiv preprint arXiv:2604.07657},
year = {2026}
}
Comments
Comments, criticisms, questions and suggestions welcome