4 papers
Scalar and Vector Massive Fields in Lyra's Manifold
R. Casana, C. A. M. de Melo, B. M. Pimentel
The problem of coupling between spin and torsion is analysed from a Lyra's manifold background for scalar and vector massive fields using the Duffin-Kemmer-Petiau (DKP) theory. We…
Quantum spin tunneling in a soluble quasi-spin model: An angle-based potential description
D. Galetti, C. L. Lima, B. M. Pimentel
We propose an approach which allows to construct and use a potential function written in terms of an angle variable to describe interacting spin systems. We show how this can be im…
Equivalence of Many-Photon Green Functions in DKP and KGF Statistical Quantum Field Theories
V. Ya. Fainberg, B. M. Pimentel, J. S. Valverde
We prove the equivalence of many-photon Green functions in statistical quantum field Duffin-Kemmer-Petiau (DKP) and Klein-Gordon-Fock (KGF) theories using functional path integral…
Field gauge divergences in the light-front
J. H. O. Sales, T. Frederico, B. M. Pimentel
The Bethe-Salpeter equation for ground state of two fermions exchanging a gauge boson presents divergences. We used a prescription that allowed an apropriate prescription of the si…