Determinant quantum Monte Carlo for the half-filled Hubbard model with nonlocal density-density interactions
Determinant quantum Monte Carlo for the half-filled Hubbard model with nonlocal density-density interactions
We design a novel formalism of determinant quantum Monte Carlo method for the half-filled Hubbard model with on-site Hubbard interaction $U$ and nearest-neighbor density-density interaction $V$ on the square lattice. The formalism is free of sign problem for $|U|\ensuremath{\ge}4|V|$, and is achieved by introducing discrete auxiliary fields on the nearest-neighbor …