85 citations · 457 across the 22 of their papers we have counts for
3 papers · 1 filter
Quantum phase transitions on the hexagonal lattice
Dominik Smith, Pavel Buividovich, Michael Körner +2
Hubbard-type models on the hexagonal lattice are of great interest, as they provide realistic descriptions of graphene and other related materials. Hybrid Monte Carlo simulations o…
Taming the sign problem of the finite density Hubbard model via Lefschetz thimbles
Maksim Ulybyshev, Christopher Winterowd, Savvas Zafeiropoulos
We study the sign problem in the Hubbard model on the hexagonal lattice away from half-filling using the Lefschetz thimbles method. We identify the saddle points, reduce their amou…
Lefschetz thimbles decomposition for the Hubbard model on the hexagonal lattice
Maksim Ulybyshev, Christopher Winterowd, Savvas Zafeiropoulos
We propose a framework to study the properties of the Lefschetz thimbles decomposition for lattice fermion models approaching the thermodynamic limit. The proposed set of algorithm…