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12 papers · 2 filters
Global embedding of D-dimensional black holes with a cosmological constant in Minkowskian spacetimes: Matching between Hawking temperature and Unruh temperature
Nuno Loureiro Santos, Oscar J. C. Dias, José P. S. Lemos
We study the matching between the Hawking temperature of a large class of static D-dimensional black holes and the Unruh temperature of the corresponding higher dimensional Rindler…
New instability for rotating black branes and strings
Vitor Cardoso, José P. S. Lemos
The evolution of small perturbations around rotating black branes and strings, which are low energy solutions of string theory, are investigated. For simplicity, we concentrate on…
Pair creation of higher dimensional black holes on a de Sitter background
Oscar J. C. Dias, Jose' P. S. Lemos
We study in detail the quantum process in which a pair of black holes is created in a higher D-dimensional de Sitter (dS) background. The energy to materialize and accelerate the p…
Towards Quantum Dielectric Branes: Curvature Corrections in Abelian Beta Function and Nonabelian Born-Infeld Action
Pedro Bordalo, Lorenzo Cornalba, Ricardo Schiappa
We initiate a programme to compute curvature corrections to the nonabelian BI action. This is based on the calculation of derivative corrections to the abelian BI action, describin…
Small Kerr-anti-de Sitter black holes are unstable
Vitor Cardoso, Oscar J. C. Dias
Superradiance in black hole spacetimes can trigger instabilities. Here we show that, due to superradiance, small Kerr-anti-de Sitter black holes are unstable. Our demonstration use…
The covariant entropy bound in gravitational collapse
Sijie Gao, Jose' P. S. Lemos
We study the covariant entropy bound in the context of gravitational collapse. First, we discuss critically the heuristic arguments advanced by Bousso. Then we solve the problem th…