Compact Lattice QED with Staggered Fermions and Chiral Symmetry Breaking
A. Hoferichter, V.K. Mitrjushkin, M. M\"uller-Preussker
TL;DR
This study compares different formulations of 4D compact lattice QED with staggered fermions, revealing a phase transition only at unphysical negative coupling values after suppressing lattice artifacts.
Contribution
It introduces a modified formulation of lattice QED that suppresses lattice artifacts and investigates its phase structure through Monte Carlo simulations.
Findings
Phase transition occurs only at negative beta values.
Suppression of lattice artifacts affects the phase structure.
Chiral symmetry breaking appears only at unphysical parameters.
Abstract
Different formulations of the compact lattice QED with staggered fermions (standard Wilson and modified by suppression of lattice artifacts) are investigated by Monte Carlo simulations within the quenched approximation. We show that after suppressing lattice artifacts the system undergoes a phase transition from the Coulomb phase into a presumably weakly chirally broken phase only at (unphysical) negative --values.
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