Reducing the Sign Problem with simple Contour Deformation

Autor:	Gäntgen, Christoph, Berkowitz, Evan, Luu, Thomas, Ostmeyer, Johann, Rodekamp, Marcel
Rok vydání:	2024
Předmět:	Condensed Matter - Strongly Correlated Electrons High Energy Physics - Lattice Physics - Computational Physics
Zdroj:	Proceedings of Science Volume 453 (LATTICE2023)
Druh dokumentu:	Working Paper
DOI:	10.22323/1.453.0007
Popis:	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. Comment: Proceedings for the 40th Lattice conference (2023)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2407.06896 Zobrazit plný text záznamu View this record from Arxiv