46 citations · 91 across the 6 of their papers we have counts for
6 papers
The Exact Foldy-Wouthuysen Transformation for a Dirac Theory Revisited
Bruno Gonçalves, Mário M. Dias Júnior, Baltazar J. Ribeiro
The Exact Foldy-Wouthuysen transformation (EFWT) method is generalized here. In principle, it is not possible to construct the EFWT to any Hamiltonian. The transformation condition…
Birefringence phenomena revisited
Dante D. Pereira, Baltazar J. Ribeiro, Bruno Gonçalves
The propagation of electromagnetic waves is investigated in the context of the isotropic and nonlinear dielectric media at rest in the eikonal limit of the geometrical optics. Taki…
The space-time torsion in the context of the Exact Foldy-Wouthuysen Transformation for a Dirac fermion
Bruno Goncalves, Baltazar Jonas Ribeiro Morais, Dante Donizeti Pereira +1
In this work we focus our attention in the inconsistency that appears when the Semi-Exact Foldy-Wouthuysen transformation for the Dirac field interacting with space-time torsion fi…
The Exact Foldy-Wouthuysen Transformation for a Dirac Theory with the complete set of CPT-Lorentz violating terms
Bruno Gonçalves, Mário M. Dias Júnior, Baltazar J. Ribeiro
The exact Foldy-Wouthuysen transformation is performed in order to study the Dirac field interacting with many possible external fields associated with CPT-Lorentz violation. We al…
Vacuum stress-tensor in SSB theories
Manuel Asorey, Petr M. Lavrov, Baltazar J. Ribeiro +1
The renormalized energy-momentum tensor of vacuum has been deeply explored many years ago. The main result of these studies was that such a tensor should satisfy the conservation l…
Effective Potential in Curved Space and Cut-Off Regularizations
Flavia Sobreira, Baltazar J. Ribeiro, Ilya L. Shapiro
We consider derivation of the effective potential for a scalar field in curved space-time within the physical regularization scheme, using two sorts of covariant cut-off regulariza…