Evaporation of large black holes in AdS: greybody factor and decay rate

Details Evaporation of large black holes in AdS: greybody factor and decay rate Evaporation of large black holes in AdS: greybody factor and decay rate

2009-05-27

arxiv.org/abs/0905.4373v2

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, 2 figures; v2: added references, published version

Scientific paper

We consider a massless, minimally coupled scalar field propagating through the geometry of a black 3-brane in an asymptotically $AdS_5 \times S^5$ space. The wave equation for modes traveling purely in the holographic direction reduces to a Heun equation and the corresponding greybody factor is obtained numerically. Approximations valid in the low- and high-frequency regimes are also obtained analytically. The greybody factor is then used to determine the rate of evaporation of these large black holes in the context of the evaporon model proposed in \cite{Rocha:2008fe}. This setting represents the evolution of a black hole under Hawking evaporation with a known CFT dual description and is therefore unitary. Information must then be preserved under this evaporation process.

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