85 citations · 457 across the 22 of their papers we have counts for
5 papers · 1 filter
Path integral representation for the Hubbard model with reduced number of Lefschetz thimbles
M. V. Ulybyshev, S. N. Valgushev
The concept of Lefschetz thimble decomposition is one of the most promising possible modifications of Quantum Monte Carlo (QMC) algorithms aimed at alleviating the sign problem whi…
Quantum Monte Carlo study of static potential in graphene
N. Yu. Astrakhantsev, V. V. Braguta, M. I. Katsnelson +2
In this paper the interaction potential between static charges in suspended graphene is studied within the quantum Monte Carlo approach. We calculated the dielectric permittivity o…
Collective charge excitations and the metal-insulator transition in the square lattice Hubbard-Coulomb model
Maksim Ulybyshev, Christopher Winterowd, Savvas Zafeiropoulos
In this article, we discuss the non-trivial collective charge excitations (plasmons) of the extended square-lattice Hubbard model. Using a fully non-perturbative approach, we emplo…
A Hybrid-Monte-Carlo study of monolayer graphene with partially screened Coulomb interactions at finite spin density
Michael Körner, Dominik Smith, Pavel Buividovich +2
We report on Hybrid-Monte-Carlo simulations at finite spin density of the -band electrons in monolayer graphene with realistic inter-electron interactions. Unlike simulations at…
Inter-electron interactions and the RKKY potential between H adatoms in graphene
Pavel Buividovich, Dominik Smith, Maksim Ulybyshev +1
We use first-principles Quantum Monte-Carlo simulations to study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between hydrogen adatoms attached to a graphene sheet. We find…