Superradiant instability of charged scalar field in stringy black hole mirror systemReportar como inadecuado




Superradiant instability of charged scalar field in stringy black hole mirror system - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

The European Physical Journal C

, 74:3051

First Online: 27 September 2014Received: 30 March 2014Accepted: 01 September 2014

Abstract

It has been shown that the mass of a charged scalar field in the background of a charged stringy black hole is never able to generate a potential well outside the event horizon to trap the superradiant modes. This is to say that the charged stringy black hole is stable against massive charged scalar perturbations. In this paper we will study the superradiant instability of the massless scalar field in the background of charged stringy black hole due to a mirror-like boundary condition. The analytical expression of the frequencies of unstable superradiant modes is derived by using the asymptotic matching method. It is also pointed out that the black hole mirror system becomes extremely unstable for a large charge \q\ of the scalar field and a small mirror radius m\.

Download fulltext PDF



Autor: Ran Li - Junkun Zhao

Fuente: https://link.springer.com/







Documentos relacionados