Work

Unpaired Weyl fermion on an axion string in a finite lattice

Year: 2025

Type: article

Abstract: Domain wall fermions use a 2 n -dimensional spacetime defect embedded in ( 2 n + 1 )-dimensional spacetime to realize massless lattice Dirac fermions. Recent work has extended this idea to realize a single unpaired Weyl fermion in a finite lattice. Here, we realize the same using a 2 n -dimensional string defect embedded in ( 2 n + 2 )-dimensional spacetime on a finite lattice for n = 1 . This string is a lattice version of the continuum axion string described in Callan-Harvey []. Our results are obtained in a Hamiltonian formulation in Minkowski spacetime. Extending the results to Euclidean spacetime and to n > 1 is straightforward. This work has applications to lattice chiral gauge theories and axion cosmology.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/twkg-8p31

Authors: Jonathan D. Kroth, Srimoyee Sen

Institution: Iowa State University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: U.S. Department of Energy, Nuclear Physics

Awards: G1863972480, G2396296114, G3046481131, QUANTUM MATERIALS, LATTICE GAUGE THEORY AND QCD