Lattice models with subsystem/weak non-invertible symmetry-protected topological order
Strongly Correlated Electrons
2026-01-21 v2 High Energy Physics - Theory
Quantum Physics
Abstract
We construct a family of lattice models which possess subsystem non-invertible symmetry-protected topological (SPT) order and analyze their interface modes protected by the symmetry, whose codimension turns out to be more than one. We also propose 2+1d lattice models which belong to two different weak SPT phases distinguished by a combination of translational symmetry and non-invertible symmetry. We show that the interface between them exhibits an exotic Lieb-Schultz-Mattis (LSM) anomaly associated with a modulated symmetry, which cannot be factorized into a direct product of internal and translational symmetries.
Keywords
Cite
@article{arxiv.2505.11419,
title = {Lattice models with subsystem/weak non-invertible symmetry-protected topological order},
author = {Yuki Furukawa},
journal= {arXiv preprint arXiv:2505.11419},
year = {2026}
}
Comments
55 pages, 4 figures; minor improvements and clarifications