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10 papers · 2 filters
Scalar-gravitational perturbations and quasinormal modes in the five dimensional Schwarzschild black hole
Vitor Cardoso, Jose' P. S. Lemos, Shijun Yoshida
We calculate the quasinormal modes (QNMs) for gravitational perturbations of the Schwarzschild black hole in the five dimensional (5D) spacetime with a continued fraction method. F…
On Symmetries in (Anti)Causal (Non)Abelian Quantum Theories
F. Kleefeld
(Anti)causal boundary conditions being imposed on the (seemingly) Hermitian Quantum Theory (HQT) as described in standard textbooks lead to an (Anti)Causal Quantum Theory ((A)CQT)…
Pair creation of de Sitter black holes on a cosmic string background
Oscar J. C. Dias, Jose' P. S. Lemos
We analyze the quantum process in which a cosmic string breaks in a de Sitter (dS) background, and a pair of neutral or charged black holes is produced at the ends of the string. T…
Late-Time Tails of Wave Propagation in Higher Dimensional Spacetimes
Vitor Cardoso, Shijun Yoshida, Oscar J. C. Dias +1
We study the late-time tails appearing in the propagation of massless fields (scalar, electromagnetic and gravitational) in the vicinities of a D-dimensional Schwarzschild black ho…
D-Branes in Topological Membranes
P. Castelo Ferreira, I. I. Kogan, R. J. Szabo
It is shown how two-dimensional states corresponding to D-branes arise in orbifolds of topologically massive gauge and gravity theories. Brane vertex operators naturally appear in…
The effect of nonlocal confining kernels on magnetic chiral condensates
R. Gonzalez Felipe, G. M. Marques, J. E. Ribeiro
The physics of spontaneous chiral symmetry breaking in the case of the simultaneous presence of a magnetic field and a fermionic quartic interaction is discussed for both local and…