74,244 research outputs found
Quasinormal modes of D-dimensional de Sitter spacetime
We calculate the exact values of the quasinormal frequencies for an
electromagnetic field and a gravitational perturbation moving in
-dimensional de Sitter spacetime (). We also study the quasinormal
modes of a real massive scalar field and we compare our results with those of
other references.Comment: 26 pages, 1 table. Some changes made according to referee's
suggestions. Matches published version in GR
Electromagnetic quasinormal modes of D-dimensional black holes II
By using the sixth order WKB approximation we calculate for an
electromagnetic field propagating in D-dimensional Schwarzschild and
Schwarzschild de Sitter black holes its quasinormal frequencies for the
fundamental mode and first overtones. We study the dependence of these QN
frequencies on the value of the cosmological constant and the spacetime
dimension. We also compare with the known results for the gravitational
perturbations propagating in the same background. Moreover we exactly compute
the QN frequencies of the electromagnetic field propagating in D-dimensional
massless topological black hole and for charged D-dimensional Nariai spacetime
we exactly calculate the QN frequencies of the coupled electromagnetic and
gravitational perturbations.Comment: 34 pages, 14 figures, 6 table
One-dimensional relativistic dissipative system with constant force and its quantization
For a relativistic particle under a constant force and a linear velocity
dissipation force, a constant of motion is found. Problems are shown for
getting the Hamiltoninan of this system. Thus, the quantization of this system
is carried out through the constant of motion and using the quantization of the
velocity variable. The dissipative relativistic quantum bouncer is outlined
within this quantization approach.Comment: 11 pages, no figure
Dynamical study of spinodal decomposition in heavy ion collisions
Nuclei undergo a phase transition in nuclear reactions according to a caloric
curve determined by the amount of entropy. Here, the generation of entropy is
studied in relation to the size of the nuclear system.Comment: 4 pages, 2 figures, Contributed paper for the 5th Latin American
Symposium on High Energy Physics: V-SILAFAE (2004
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