We apply constant imaginary offsets to the path integral for a reduction of the sign problem in the
Hubbard model. These simple transformations enhance the quality of results from HMC
calculations without compromising the speed of the algorithm. This method enables us to efficiently
calculate systems that are otherwise inaccessible due to a severe sign problem. To support this claim,
we present observables of the C20 and C60 fullerenes. Furthermore, we demonstrate that at a certain
offset, the sign problem is completely lifted in the limit of large chemical potential.
Volume 453 -
The 40th International Symposium on Lattice Field Theory (LATTICE2023) -
Algorithms and Artificial Intelligence
Reducing the Sign Problem with simple Contour Deformation
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Pre-published on:
May 05, 2024
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Abstract
DOI: https://doi.org/10.22323/1.453.0007
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.