Artículos de revistas
The Bullough-Dodd model coupled to matter fields
Fecha
2008Registro en:
NUCLEAR PHYSICS B, v.800, n.3, p.409-449, 2008
0550-3213
10.1016/j.nuclphysb.2008.01.004
Autor
ASSIS, P. E. G.
FERREIRA, Luiz Agostinho
Institución
Resumen
The Bullough-Dodd model is an important two-dimensional integrable field theory which finds applications in physics and geometry. We consider a conformally invariant extension of it, and study its integrability properties using a zero curvature condition based on the twisted Kac-Moody algebra A(2)((2)). The one- and two-soliton solutions as well as the breathers are constructed explicitly. We also consider integrable extensions of the Bullough-Dodd model by the introduction of spinor (matter) fields. The resulting theories are conformally invariant and present local internal symmetries. All the one-soliton solutions, for two examples of those models, are constructed using a hybrid of the dressing and Hirota methods. One model is of particular interest because it presents a confinement mechanism for a given conserved charge inside the solitons. (C) 2008 Elsevier B.V. All rights reserved.