3 papers
cond-mat2002
Thermodynamics of the one-dimensional s=1 XXZ Heisenberg model: analytical results
O. Rojas, E. V. Correa-Silva, W. A. Moura-Melo +2
We apply the results recently derived by Rojas et al. to derive the beta-expansion of the Helmholtz free energy of the spin-1 XXZ Heisenberg model up to 5th order in beta. The anal…
hep-th2001
Generalized Gauge Transformations and Regularized -type Abelian Vertices
Winder A. Moura-Melo, J. A. Helayel-Neto
Abelian Lagrangians containing -type vertices are regularized by means of a suitable point-splitting scheme combined with generalized gauge transformations. The calculation…
hep-th1998
Generalized Gauge Transformations and Regularized -type Abelian Vertices
Winder A. Moura-Melo, J. A. Helayel-Neto
Abelian Lagrangians containing Phi^4-type vertices are regularized by means of a suitable point-splitting scheme combined with generalized gauge transformations.. The calculation i…