Baker--Akhiezer sections from Higgs bundles and Landau levels in hyperbolic band theory
Abstract
As observed by Kienzle and the second author, rank-two ๐ช(3)-twisted Higgs bundles on the projective line encode all hyperbolic crystals of genus two: the spectral curves are the unit cells, and the Hitchin fibers are the abelian Brillouin zones. In a uniform magnetic field of two flux quanta, the lowest Landau level is one-dimensional at every nonzero momentum, and, as found by Iengo and Li, its dimension jumps to two at the zero momentum. We identify the states of the lowest Landau level with the Baker--Akhiezer sections of the Higgs bundles, and their zeros, the vortices, with the Baker--Akhiezer divisors. A family of nonzero momenta limits to the zero momentum exactly when each of the two vortices approaches the image of the other under the spatial inversion, and the states of the jumped level are labeled by the directions of limiting. On the Higgs bundle side, the zero momentum is the point where the Hitchin fiber intersects the Hitchin section. Such a family of Higgs bundles limits to the Hitchin section, thereby crossing to a lower stratum of the \BB stratification, an example of the phenomenon investigated in terms of Baker--Akhiezer divisors by the first author with Figiel and Teschner.
Related
- Generalized Killing spinors as Lagrangian sections of principal spin bundles
- Irregular Hodge Bundles for Deligne--Mumford Landau--Ginzburg Families with Fixed Pole Orders
- Landau Levels of Landau-Raychaudhuri Equation and Wheeler-DeWitt Crystals.
- Cusp cross-sections of low-dimensional arithmetic hyperbolic manifolds
- Finiteness of closed arithmetic hyperbolic surface bundles
BibTeX
@misc{dinh2026bakerakhiezer,
title = {{Baker--Akhiezer sections from Higgs bundles and Landau levels in hyperbolic band theory}},
author = {Duong Dinh and Steven Rayan},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.42134},
eprint = {2610.42134},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.42134},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Baker--Akhiezer sections from Higgs bundles and Landau levels in hyperbolic band theory
AU - Duong Dinh
AU - Steven Rayan
PY - 2026
DA - 2026/10/30
PB - arXiv
DO - 10.48550/arxiv.2610.42134
UR - https://arxiv.org/abs/2610.42134
AB - As observed by Kienzle and the second author, rank-two ๐ช(3)-twisted Higgs bundles on the projective line encode all hyperbolic crystals of genus two: the spectral curves are the unit cells, and the Hitchin fibers are the abelian Brillouin zones. In a uniform magnetic field of two flux quanta, the lowest Landau level is one-dimensional at every nonzero momentum, and, as found by Iengo and Li, its dimension jumps to two at the zero momentum. We identify the states of the lowest Landau level with the Baker--Akhiezer sections of the Higgs bundles, and their zeros, the vortices, with the Baker--Akhiezer divisors. A family of nonzero momenta limits to the zero momentum exactly when each of the two vortices approaches the image of the other under the spatial inversion, and the states of the jumped level are labeled by the directions of limiting. On the Higgs bundle side, the zero momentum is the point where the Hitchin fiber intersects the Hitchin section. Such a family of Higgs bundles limits to the Hitchin section, thereby crossing to a lower stratum of the \BB stratification, an example of the phenomenon investigated in terms of Baker--Akhiezer divisors by the first author with Figiel and Teschner.
ER -