Landau Gauge Fixing on GPUs and String Tension

TL;DR

This paper demonstrates GPU-accelerated Landau gauge fixing in Lattice QCD using CUDA, and studies the string tension at finite temperature through gauge-fixed free energy measurements.

Contribution

It introduces a GPU implementation of Landau gauge fixing with Fourier acceleration and applies it to analyze string tension at finite temperature.

Findings

GPU implementation achieves performance improvements

String tension is successfully extracted from gauge-fixed free energy

Finite temperature effects on string tension are analyzed

Abstract

We explore the performance of CUDA in performing Landau gauge fixing in Lattice QCD, using the steepest descent method with Fourier acceleration. The code performance was tested in a Tesla C2070, Fermi architecture. We also present a study of the string tension at finite temperature in the confined phase. The string tension is extracted from the color averaged free energy and from the color singlet using Landau gauge fixing.