3 papers
math-ph2020
Absence of eigenvalues in the continuous spectrum for Klein-Gordon operators
R. Ferreira, F. N. Lima, A. S. Ribeiro
We construct the one-dimensional analogous of von-Neumann Wigner potential to the relativistic Klein-Gordon operator, in which is defined taking asymptotic mathematical rules in or…
gr-qc2019
Mass spectrum of scalar and gauge fields in the cosmological multiply warped brane-world
A. S. Ribeiro, G. Alencar, R. R. Landim +1
In this paper, we compute the massive modes of scalar and gauge fields in a multiply warped brane-world scenario in six-dimensional spacetime with a Freedman-Robertson-Walker (FRW)…
gr-qc2019
An exact solution of the orbit equation for a massive particle in Schwarzschild metric
A. S. Ribeiro, F. N. Lima
In this paper, we consider a spherically curved symmetric spacetime to exact solving the orbit equation of a massive particle by using Jacobi's elliptic functions. Generally, the s…