Jul 20 – 24, 2015
Frankfurt Institute for Advanced Studies
Europe/Berlin timezone

Einstein-Charged Scalar Field Theory: Black Hole Solutions and Their Stability.

Jul 21, 2015, 2:00 PM
20m
Frankfurt Institute for Advanced Studies

Frankfurt Institute for Advanced Studies

Goethe-Universität FrankfurtCampus Riedberg Ruth-Moufang-Straße 1 60438 Frankfurt am Main GERMANY

Speaker

Supakchai Ponglertsakul

Description

A charged scalar field can be used to extract energy from a charged black hole via superradiant scattering. A mirror-like or AdS boundary could lead the system to an instability. This is because the scalar fields are trapped outside the black hole and repeatedly amplified, there-fore ultimately the back-reaction on the black hole background will become non-negligible. A charged scalar field on the Reissner-Nordström background with a mirror has been shown to possess a superradiant instability [1]. However the possible end-point of this superradiant instability remains unknown. In this talk, I will consider a fully coupled system consisting of gravity, an electric field and a charged scalar field with a mirror. By solving the field equations, numerical solutions representing charged hairy black holes are obtained. Then I will comment on the stability of these solutions. More details of this work are to appear in Ref. [2]. References [1] Juan Carlos Degollado, Carlos A. R. Herdeiro, and Helgi Freyr R ´unarsson. Rapid growth of superradiant instabilities for charged black holes in a cavity. Phys.Rev., D88:063003, 2013. [2] Sam Dolan, Supakchai Ponglertsakul, and Elizabeth Winstanley. Article in preparation.

Primary author

Co-authors

Prof. Elizabeth Winstanley (Consortium for Fundamental Physics, School of Mathematics and Statistics, University of Sheffield) Dr Sam Dolan (Consortium for Fundamental Physics, School of Mathematics and Statistics, University of Sheffield)

Presentation materials

Peer reviewing

Paper