2 papers
cond-mat1994
Bosonization on the lattice: the emergence of the higher harmonics
Jaime Ferrer, J. González, M. -A. Martín-Delgado
A general and transparent procedure to bosonize fermions placed on a lattice is presented. Harmonics higher than are shown to appear in the one-paticle Green function, due to…
cond-mat1994
Direct Calculation of Spin-Stiffness for Spin-1/2 Heisenberg Models
J. Bonca, J. P. Rodriguez, J. Ferrer +1
The spin-stiffness of frustrated spin-1/2 Heisenberg models in one and two dimensions is computed for the first time by exact diagonalizations on small clusters that implement spin…