2014/07/31 by Thomas DeGrand, Yigal Shamir, Benjamin Svetitsky
Mathematics · Physics and Astronomy · #Fermion #Gauge theory #High-Energy Particle Collisions Research #Mathematics #Monte Carlo method #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Statistical physics #Valence (chemistry) #hep-lat
paper · pdf · doi:10.1103/physrevd.90.054501
published as Phys. Rev. D 90, 054501 (2014) · Revtex, 10 pages, 2 figures
arxiv created 2014/09/01 · openalex publication_date 2014/09/03 · arxiv updated 2014/09/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Normalized hypercubic smearing improves the behavior of dynamical Wilson-clover fermions, but has the unwanted side effect that it can occasionally produce spikes in the fermion force. These spikes originate in the chain rule connecting the derivative with respect to the smeared links to the derivative with respect to the dynamical links, and are associated with the presence of dislocations in the dynamical gauge field. We propose and study an action designed to suppress these dislocations. We present evidence for improved performance of the hybrid Monte Carlo algorithm. A side benefit is improvement in the properties of valence chiral fermions.