Volume 466 - The 41st International Symposium on Lattice Field Theory (LATTICE2024) - Algorithms and Artificial Intelligence
Hessian-free force-gradient integrators and their application to lattice QCD simulations
K. Schäfers*, J. Finkenrath, M. Günther and F. Knechtli
*: corresponding author
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Pre-published on: January 29, 2025
Published on:
Abstract
We present initial results on Hessian-free force-gradient integrators for lattice field theories. Integrators of this framework promise to provide substantial performance enhancements, particularly
for larger lattice volumes where higher-order integrators demonstrate greater efficiency. Numerical
results demonstrate the superior efficiency of the proposed integrators compared to commonly
employed non-gradient schemes, particularly due to enhanced stability properties. It is anticipated
that the advantages of the Hessian-free framework will become even more pronounced in nested
integration approaches and for smaller fermion masses, where the numerical stability properties
of the integrators become increasingly important.
DOI: https://doi.org/10.22323/1.466.0025
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