1,026 research outputs found
Wave dynamics of a six-dimensional black hole localized on a tensional three-brane
We study the quasinormal modes and the late-time tail behavior of scalar
perturbation in the background of a black hole localized on a tensional
three-brane in a world with two large extra dimensions. We find that finite
brane tension modifies the standard results in the wave dynamics for the case
of a black hole on a brane with completely negligible tension. We argue that
the wave dynamics contains the imprint of the extra dimensions.Comment: revised version, 10 pages, 1 table and 2 figures. Accepted for
publication in Phys. Lett.
Relating Friedmann equation to Cardy formula in universes with cosmological constant
A relation between the Friedmann equation and the Cardy formula has been
found for de Sitter closed and Anti de Sitter flat universes. For the remaining
(Anti) de Sitter universes the arguments fail, and we speculate whether the
general philosophy of holography can be satisfied in such contents.Comment: 11 pages, Latex file, References added. New version to be published
in Phys. Lett.
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