Holographic thermalization in a top-down confining model

Holographic thermalization in a top-down confining model

A bstract It is interesting to ask how a confinement scale affects the thermalization of strongly coupled gauge theories with gravity duals. We study this question for the AdS soliton model, which underlies top-down holographic models for Yang-Mills theory and QCD. Injecting energy via a homogeneous...

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Bibliographic Details
Published in:The journal of high energy physics Vol. 2015; no. 12; pp. 1 - 32
Main Authors: Craps, B., Lindgren, E.J., Taliotis, A.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-12-2015
Subjects:
Classical and Quantum Gravitation
Confinement
Confining
Elementary Particles
Gravitation
Mathematical analysis
Mathematical models
Modulation
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Scalars
Scattering
String Theory
Gauge-gravity correspondence
Holography and quark-gluon plasmas
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Summary:A bstract It is interesting to ask how a confinement scale affects the thermalization of strongly coupled gauge theories with gravity duals. We study this question for the AdS soliton model, which underlies top-down holographic models for Yang-Mills theory and QCD. Injecting energy via a homogeneous massless scalar source that is briefly turned on, our fully backreacted numerical analysis finds two regimes. Either a black brane forms, possibly after one or more bounces, after which the pressure components relax according to the lowest quasinormal mode. Or the scalar shell keeps scattering, in which case the pressure components oscillate and undergo modulation on time scales independent of the (small) shell amplitude. We show analytically that the scattering shell cannot relax to a homogeneous equilibrium state, and explain the modulation as due to a near-resonance between a normal mode frequency of the metric and the frequency with which the scalar shell oscillates.
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ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP12(2015)116