173 citations · 1.5k across the 50 of their papers we have counts for
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Time-dependent Gutzwiller theory of magnetic excitations in the Hubbard model
G. Seibold, F. Becca, P. Rubin +1
We use a spin-rotational invariant Gutzwiller energy functional to compute random-phase-approximation-like (RPA) fluctuations on top of the Gutzwiller approximation (GA). The metho…
Ising transition driven by frustration in a 2D classical model with SU(2) symmetry
C. Weber, L. Capriotti, G. Misguich +3
We study the thermal properties of the classical antiferromagnetic Heisenberg model with both nearest () and next-nearest () exchange couplings on the square lattice by e…
Freezing and large time scales induced by geometrical frustration
Michel Ferrero, Federico Becca, Frédéric Mila
We investigate the properties of an effective Hamiltonian with competing interactions involving spin and chirality variables, relevant for the description of the {\it trimerized} v…
A chiral spin liquid wave function and the Lieb-Schulz-Mattis theorem
S. Sorella, L. Capriotti, F. Becca +1
We study a chiral spin liquid wave function defined as a Gutwziller projected BCS state with a complex pairing function. After projection, spontaneous dimerization is found for any…
Suppression of Dimer Correlations in the Two-Dimensional - Heisenberg Model: an Exact Diagonalization Study
Luca Capriotti, Federico Becca, Alberto Parola +1
We present an exact diagonalization study of the ground state of the spin-half model. Dimer correlation functions and the susceptibility associated to the breaking of t…
Ground State of a Heisenberg Chain with Next-Nearest-Neighbor Bond Alternation
Luca Capriotti, Federico Becca, Sandro Sorella +1
We investigate the ground-state properties of the spin-half Heisenberg chain with a next-nearest-neighbor spin-Peierls dimerization using conformal field theory and Lan…