173 citations · 849 across the 23 of their papers we have counts for
6 papers · 1 filter
Magnetism and superconductivity in the model
Leonardo Spanu, Massimo Lugas, Federico Becca +1
We present a systematic study of the phase diagram of the model by using the Green's function Monte Carlo (GFMC) technique, implemented within the fixed-node (FN…
Crystallization of the resonating valence bond liquid as vortex condensation
Arnaud Ralko, Michel Ferrero, Federico Becca +2
We show that the liquid-to-crystal quantum phase transition in the Rokhsar--Kivelson dimer model on the two-dimensional triangular lattice occurs as a condensation of vortex-like e…
Theory of antibound states in partially filled narrow band systems
G. Seibold, F. Becca, J. Lorenzana
We present a theory of the dynamical two-particle response function in the Hubbard model based on the time-dependent Gutzwiller approximation. The results are in excellent agreemen…
Superfluid to Mott-insulator transition in Bose-Hubbard models
Manuela Capello, Federico Becca, Michele Fabrizio +1
We study the superfluid-insulator transition in Bose-Hubbard models in one-, two-, and three-dimensional cubic lattices by means of a recently proposed variational wave function. I…
Exotic gapless spectrum induced by frustration in quantum antiferromagnets
Federico Becca, Luca Capriotti, Alberto Parola +1
We show strong numerical evidence in favor of an unexpected virtually gapless spectrum, with edge states localized at the boundaries, in frustrated spin-1/2 antiferromagnetic ladde…
Magneto-elastic effects and magnetization plateaus in two dimensional systems
Samuele Bissola, Valeria Lante, Alberto Parola +1
We show the importance of both strong frustration and spin-lattice coupling for the stabilization of magnetization plateaus in translationally invariant two-dimensional systems. We…