Exact lattice chiral symmetry in 2d gauge theory

E Berkowitz, A Cherman, T Jacobson - Physical Review D, 2024 - APS
We construct symmetry-preserving lattice regularizations of 2D QED with one and two
flavors of Dirac fermions, as well as the “3450” chiral gauge theory, by leveraging …

Lattice regularization of reduced Kähler-Dirac fermions and connections to chiral fermions

S Catterall - SciPost Physics, 2024 - scipost.org
We show how a path integral for reduced Kähler-Dirac fermions suffers from a phase
ambiguity associated with the fermion measure that is an analog of the measure problem …

Toward a Ginsparg-Wilson lattice Hamiltonian

M Clancy - Physical Review D, 2024 - APS
To address quantum computation of quantities in quantum chromodynamics (QCD) for
which chiral symmetry is important, it would be useful to have the Hamiltonian for a fermion …

Quantized axial charge of staggered fermions and the chiral anomaly

A Chatterjee, SD Pace, SH Shao - arXiv preprint arXiv:2409.12220, 2024 - arxiv.org
In the 1+ 1D ultra-local lattice Hamiltonian for staggered fermions with a finite-dimensional
Hilbert space, there are two conserved, integer-valued charges that flow in the continuum …

Chiral gauge theory at the boundary between topological phases

DB Kaplan - Physical Review Letters, 2024 - APS
I demonstrate how chiral fermions with an exact gauge symmetry can appear on the d-
dimensional boundary of a finite volume (d+ 1)-dimensional manifold, without any light …

Chiral symmetry and Atiyah-Patodi-Singer index theorem for staggered fermions

M Nguyen, H Singh - arXiv preprint arXiv:2405.11348, 2024 - arxiv.org
We consider the Atiyah-Patodi-Singer (APS) index theorem corresponding to the chiral
symmetry of a continuum formulation of staggered fermions called K\" ahler-Dirac fermions …

Topics in Chiral Symmetry on the Lattice

M Clancy - 2024 - search.proquest.com
There currently does not exist a good regulator for chiral gauge theories on the lattice. A
number of approaches have been attempted, including domain wall fermions and overlap …