Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/15045
Title: Maxwell perturbations on asymptotically Anti-de-Sitter spacetimes: generic boundary conditions and a new branch of quasinormal modes
Author: Wang, Mengjie
Herdeiro, Carlos
Sampaio, Marco O. P.
Issue Date: 1-Dec-2015
Publisher: American Physical Society
Abstract: Perturbations of asymptotically Anti-de-Sitter (AdS) spacetimes are often considered by imposing field vanishing boundary conditions (BCs) at the AdS boundary. Such BCs, of Dirichlet-type, imply a vanishing energy flux at the boundary, but the converse is, generically, not true. Regarding AdS as a gravitational box, we consider vanishing energy flux (VEF) BCs as a more fundamental physical requirement and we show that these BCs can lead to a new branch of modes. As a concrete example, we consider Maxwell perturbations on Kerr-AdS black holes in the Teukolsky formalism, but our formulation applies also for other spin fields. Imposing VEF BCs, we find a set of two Robin BCs, even for Schwarzschild-AdS black holes. The Robin BCs on the Teukolsky variables can be used to study quasinormal modes, superradiant instabilities and vector clouds. As a first application, we consider here the quasinormal modes of Schwarzschild-AdS black holes. We find that one of the Robin BCs yields the quasinormal spectrum reported in the literature, while the other one unveils a new branch for the quasinormal spectrum.
Peer review: yes
URI: http://hdl.handle.net/10773/15045
DOI: 10.1103/PhysRevD.92.124006
ISSN: 1550-2368
Appears in Collections:CIDMA - Artigos
DFis - Artigos
GGDG - Artigos

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