12 citations · 18 across the 6 of their papers we have counts for
6 papers
Analogue of superradiance effect in acoustic black hole in the presence of disclination
Geusa de A. Marques
In this paper we invstigate the possibility of the acoustic analogue of a phenomenon like superradiance, that is, the amplification of a sound wave by reflection from the ergo-regi…
Comment to: Corrections to the fine structure constant in the spacetime of a cosmic string from the generalized uncertainty principle
Geusa de A. Marques
In the paper [F. Nasseri, Phys. Lett. B 632 (2006) 151--154], F. Nasseri supposed that the value of the angular momentum for the Bohr's atom in the presence of the cosmic string is…
Scalar and spinor solutions in the spacetimes of vacuumless defects
Sandro G. Fernandes, Geusa de A. Marques, V. B. Bezerra
We obtain solutions of the Klein-Gordon and Dirac equations in the gravitational fields of vacuumless defects. We calculate the energy levels and the current, respectively, in the…
Remarks on some quantum effects in the spacetime of a cosmic string
Geusa de A. Marques, V. B. Bezerra
We study the behaviour of a non-relativistic quantum particle interacting with different potentials, in the background spacetime generated by a cosmic string. We find the energy sp…
On a generalized gravitational Aharonov-Bohm effect
Geusa de A. Marques, V. B. Bezerra
A massless spinor particle is considered in the background gravitational field due to a rotating body. In the weak field approximation it is shown that the solution of the Weyl equ…
Effects of geometry and topology on some quantum mechanical systems
Geusa de A. Marques, Valdir B. Bezerra
We study the behaviour of a nonrelativistic quantum particle interacting with different potentials in the spacetimes of topological defects. We find the energy spectra and show how…