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Journal of High Energy Physics

, 2013:82

First Online: 14 October 2013Received: 05 August 2013Accepted: 15 September 2013 Abstract

The sudden injection of energy in a strongly coupled conformal field theory and its subsequent thermalization can be holographically modeled by a shell falling into anti-de Sitter space and forming a black brane. For a homogeneous shell, Bhattacharyya and Minwalla were able to study this process analytically using a weak field approximation. Motivated by event-by-event fluctuations in heavy ion collisions, we include inhomogeneities in this model, obtaining analytic results in a long wavelength expansion. In the early-time window in which our approximations can be trusted, the resulting evolution matches well with that of a simple free streaming model. Near the end of this time window, we find that the stress tensor approaches that of second-order viscous hydrodynamics. We comment on possible lessons for heavy ion phenomenology.

KeywordsGauge-gravity correspondence Holography and quark-gluon plasmas ArXiv ePrint: 1307.7086

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Author: V. Balasubramanian - A. Bernamonti - J. de Boer - B. Craps - L. Franti - F. Galli - E. Keski-Vakkuri - B. Müller - A. S


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