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SUMMARY:Numerical evolution of 5D asymptotically AdS spacetimes - Pretoriu
 s\, F (Princeton University)
DTSTART:20130917T080000Z
DTEND:20130917T084500Z
UID:TALK47157@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Co-authors: Hans Bantilan (University of Colorado)\, Stephen G
 ubser (Princeton University)\n\nI will describe an approach to numerically
  solve Einstein gravity in 5-dimensional asymptotically Anti de Sitter spa
 cetimes (AdS). The motivation is the gauge/gravity duality of string theor
 y\, with application to scenarios that on the gravity side are described b
 y dynamical\, strong-field solutions. For example\, it has been argued tha
 t certain properties of the quark-gluon plasma formed in heavy-ion collisi
 ons can be modeled by a conformal field theory\, with the dual description
  on the gravity side provided by the collision of black holes. As a first 
 step towards modeling such more general phenomena\, we initially focus on 
 spacetimes with SO(3) symmetry in the bulk\; i.e.\, axisymmetric gravity\,
  dual to states with spherical or special conformal symmetry on the bounda
 ry. For a first application we study quasi-normal ringdown of highly defor
 med black holes in the bulk. Even though the initial states are far from e
 quilibrium\, the boundary state is remarkably well described as a hyd rody
 namic flow from early times. The code is based on the generalized harmonic
  formulation of the field equations\, and though this method has been show
 n to work well in many asymptotically flat scenarios\, there are unique ch
 allenges that arise in obtaining regular\, stable solutions in asymptotica
 lly AdS spacetimes. I will describe these challenges\, and the way we have
  addressed them.\n
LOCATION:Seminar Room 1\, Newton Institute
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