In this paper we consider a class of systems of two coupled real scalar fields in bidimensional spacetime, with the main motivation of studying classical or linear stability of soliton solutions.… (More)

Abstract We present a detailed study of plane waves in noncommutative abelian gauge theories. The dispersion relation is deformed from its usual form whenever a constant background electromagnetic… (More)

We study the duality symmetry in p-form models containing a generalized Bq ∧ Fp+1 term in spacetime manifolds of arbitrary dimensions. The equivalence between the Bq ∧Fp+1 self-dual (SDB∧F ) and the… (More)

We investigate the radiatively induced Chern-Simons-like term in fourdimensional field theory at finite temperature. The Chern-Simons-like term is temperature dependent and breaks the Lorentz and CPT… (More)

T. Mariz, J. R. Nascimento, E. Passos and R. F. Ribeiro∗ Departamento de F́ısica, Universidade Federal da Paráıba, Caixa Postal 5008, 58051-970 João Pessoa, Paráıba, Brazil (Dated: March 25, 2004)… (More)

We study the nonrelativistic limit of the theory of a quantum Chern–Simons field minimally coupled to Dirac fermions. To get the nonrelativistic effective Lagrangian one has to incorporate vacuum… (More)

– We apply the noncommutative fields method for gauge theory in three dimensions where the Chern-Simons term is generated in the three-dimensional electrodynamics. Under the same procedure, the… (More)

The anomaly found by Callan and Harvey is shown to be cancelled in a threedimensional noncommutative gauge theory coupled to a fermion with a mass function depending on one spatial coordinate (domain… (More)