A Note on Coadjoint Orbits for Multifermion Systems
High Energy Physics - Theory
2026-04-21 v1 Strongly Correlated Electrons
Mathematical Physics
math.MP
Nuclear Theory
Abstract
The coadjoint orbit action for a multifermion system, as an exact description of its dynamics, is considered. A parametrization of the variables involved is given which facilitates the approximation of this by another coadjoint orbit action suitable for expansions around the Fermi surface, recovering various actions which have been used in previous literature. The presentation of this in terms of functions on phase space with star-products as well as further truncations are briefly considered.
Cite
@article{arxiv.2604.17491,
title = {A Note on Coadjoint Orbits for Multifermion Systems},
author = {V. P. Nair},
journal= {arXiv preprint arXiv:2604.17491},
year = {2026}
}
Comments
18 pages