12 research outputs found
Comment to: Corrections to the fine structure constant in the spacetime of a cosmic string from the generalized uncertainty principle
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 quantized in units of ℏ. Using this
assumption it was obtained an incorrect expression for Bohr radius in this
scenario. In this comment I want to point out that this assumption is not
correct and present a corrected expression for the Bohr radius in this
background.Comment: This paper was published in Phys. Lett.
On a generalized gravitational Aharonov-Bohm effect
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 equations depend on the angular momentum of the
rotating body, which does not affect the curvature in this approximation. This
result may be looked upon as a generalization of the gravitational
Aharonov-Bohm effect.Comment: 10 pages, LATEX fil
Non-relativistic quantum systems on topological defects space-times
We study the behavior of non-relativistic quantum particles interacting with
different potentials in the space-times generated by a cosmic string and a
global monopole. We find the energy spectra in the presence of these
topological defects and show how they differ from their free space-time values.Comment: 17 pages, LATEX fil