28 citations · 116 across the 12 of their papers we have counts for
12 papers
Linear Nash-Greene fluctuations on the evolution of and tensions
Abraão J. S. Capistrano, Luís A. Cabral, José A. P. F. Marão +1
We present the perturbation equations in an embedded four space-time from the linear Nash-Greene fluctuations of background metric. In the context of a five-dimensional bulk, we sh…
Exotic looped trajectories via quantum marking
J. G. G. de Oliveira, Gustavo de Souza, L. A. Cabral +2
We provide an analytical and theoretical study of exotic looped trajectories (ELTs) in a double-slit interferometer with quantum marking. We use an excited Rydberg-like atom and wh…
Poisson's spot and Gouy phase
I. G. da Paz, Rodolfo Soldati, L. A. Cabral +2
Recently there have been experimental results on Poisson spot matter wave interferometry followed by theoretical models describing the relative importance of the wave and particle…
Implications on the cosmic coincidence by a dynamical extrinsic curvature
A. J. S Capistrano, L. A. Cabral
In this work, we apply the smooth deformation concept in order to obtain a modification of Friedmann equations. It is shown that the cosmic coincidence can be at least alleviated u…
Gouy phase in non-classical paths in triple-slit interference experiment
Irismar da Paz, Carlos Vieira, Robert Ducharme +3
We propose a simple model to study the Gouy phase effect in the triple-slit experiment in which we consider a non-classical path. The Gouy phase differs for classical or non-classi…
Evolving extrinsic curvature and the cosmological constant problem
Abraao J. S. Capistrano, Luiz A. Cabral
The concept of smooth deformation of Riemannian manifolds associated with the extrinsic curvature is explained and applied to the FLRW cosmology. We show that such deformation can…
Position-momentum correlations in matter waves double-slit experiment
J. S. M. Neto, I. G. da Paz, L. A. Cabral
We present a treatment of the double-slit interference of matter-waves represented by Gaussian wavepackets. The interference pattern is modelled with Green's function propagator wh…
Conductivity of Coulomb interacting massless Dirac particles in graphene: Regularization-dependent parameters and symmetry constraints
G. Gazzola, A. L. Cherchiglia, L. A. Cabral +2
We compute the Coulomb correction to the a. c. conductivity of interacting massless Dirac particles in graphene in the collisionless limit using the polarization tens…
(Un)determined finite regularization dependent quantum corrections: the Higgs decay into two photons and the two photon scattering examples
A. L. Cherchiglia, L. A. Cabral, M. C. Nemes +1
We investigate the appearance of arbitrary, regularization dependent parameters introduced by divergent integrals in two a priori finite but superficially divergent amplitudes: the…
Ambiguities in the gravitational correction of quantum electrodynamics
J. C. C. Felipe, L. A. Cabral, L. C. T. Brito +2
We verify that quadratic divergences stemming from gravitational corrections to QED which have been conjectured to lead to asymptotic freedom near Planck scale are arbitrary (regul…
Particles and Strings in Degenerate Metric Spaces
Luis A. Cabral, Victor O. Rivelles
We consider relativistic and non-relativistic particles and strings in spaces (or space-times) with a degenerate metric. We show that the resulting dynamics is described by a rich…
Particles in Degenerate Metric Spaces
Luis A. Cabral, Victor O. Rivelles
This paper has been withdraw by the authors. An enlarged and complete analysis of the constraints is presented in hep-th/9910163. It includes also relativistic particles and string…