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On holographic thermalization and gravitational collapse of tachyonic scalar fields
- Publication Year :
- 2013
-
Abstract
- In this paper we study the thermalization of a spatially homogeneous system in a strongly coupled CFT. The non-equilibrium initial state is created by switching on a relevant perturbation in the CFT vacuum during Delta t >= t >= -Delta t. Via AdS/CFT, the thermalization process corresponds to the gravitational collapse of a tachyonic scalar field (m^2 = -3) in the Poincare patch of AdS_5. In the limit Delta t < 0.02/T, the thermalization time t_T is found to be quantitatively the same as that of a non-equilibrium state created by a marginal perturbation discussed in Ref. [5]. In the case Delta t >= 1/T, we also obtain double-collapse solutions but with a non-equilibrium intermediate state at t = 0. In all the cases our results show that the system thermalizes in a typical time t_T ~ O(1)/T. Besides, a conserved energy-moment current in the bulk is found, which helps understand the qualitative difference of the collapse process in the Poincare patch from that in global AdS[9, 10].<br />24 pages, 13 figures, minor modifications, references added, final version to appear in JHEP
- Subjects :
- Physics
High Energy Physics - Theory
Nuclear and High Energy Physics
Wilson loop
Nuclear Theory
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
General Relativity and Quantum Cosmology
Nuclear Theory (nucl-th)
symbols.namesake
AdS/CFT correspondence
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
High Energy Physics - Theory (hep-th)
Tachyon
Quantum electrodynamics
Gravitational collapse
symbols
Boundary value problem
Anti-de Sitter space
Klein–Gordon equation
Scalar field
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....a75c1bb25b27d5e50bfb75458f5fef31