Non-Hermitian Hubbard model without the sign problem
Strongly Correlated Electrons
2021-09-08 v2 Quantum Gases
Statistical Mechanics
High Energy Physics - Lattice
Abstract
We study the Hubbard model with non-Hermitian asymmetric hopping terms. The conjugate hopping terms are introduced for two spin components so that the negative sign is canceled out. This ensures that the quantum Monte Carlo simulation is free from the negative sign problem. We analyze the antiferromagnetic order and its suppression by the non-Hermiticity.
Keywords
Cite
@article{arxiv.2106.06192,
title = {Non-Hermitian Hubbard model without the sign problem},
author = {Tomoya Hayata and Arata Yamamoto},
journal= {arXiv preprint arXiv:2106.06192},
year = {2021}
}
Comments
5 pages, 4 figures; (v2) version accepted for publication in PRB