PIRSA:14050038

Video URL

https://pirsa.org/14050038

Holographic Path to the Turbulent Side of Gravity

Green, S. (2014). Holographic Path to the Turbulent Side of Gravity. Perimeter Institute for Theoretical Physics. https://pirsa.org/14050038

Green, Stephen. Holographic Path to the Turbulent Side of Gravity. Perimeter Institute for Theoretical Physics, May. 07, 2014, https://pirsa.org/14050038 

          @misc{ scivideos_PIRSA:14050038,
            doi = {10.48660/14050038},
            url = {https://pirsa.org/14050038},
            author = {Green, Stephen},
            keywords = {},
            language = {en},
            title = {Holographic Path to the Turbulent Side of Gravity},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2014},
            month = {may},
            note = {PIRSA:14050038 see, \url{https://scivideos.org/pirsa/14050038}}
          }

Stephen Green University of Nottingham

Talk numberPIRSA:14050038
DOI10.48660/14050038
Source RepositoryPIRSA
Collection
Talk Type Conference

Abstract

We study the dynamics of a 2 1-dimensional relativistic viscous conformal fluid in Minkowski spacetime. Such fluid solutions arise as duals under the gravity/fluid correspondence to 3 1-dimensional asymptotically antide Sitter (AAdS) black-brane solutions to the Einstein equation. We examine stability properties of shear flows which correspond to hydrodynamic quasinormal modes of the black brane. We find that for sufficiently high Reynolds number the solution undergoes an inverse turbulent cascade to long-wavelength modes. We then map this fluid solution via the gravity/fluid duality into a bulk metric. This suggests a new and interesting feature of the behavior of perturbed AAdS black holes and black branes which is not readily captured by a standard quasinormal mode analysis. Namely for sufficiently large perturbed black objects (with long-lived quasinormal modes) nonlinear effects transfer energy from short- to long-wavelength modes via a turbulent cascade within the metric perturbation. As long-wavelength modes have slower decay this transfer of energy lengthens the overall lifetime of the perturbation. We also discuss various implications of this behavior including expectations for higher dimensions and the possibility of predicting turbulence in more general gravitational scenarios.