2 research outputs found
Isotropic AdS/CFT fireball
We study the AdS/CFT thermodynamics of the spatially isotropic counterpart of
the Bjorken similarity flow in d-dimensional Minkowski space with d>=3, and of
its generalisation to linearly expanding d-dimensional
Friedmann-Robertson-Walker cosmologies with arbitrary values of the spatial
curvature parameter k. The bulk solution is a nonstatic foliation of the
generalised Schwarzschild-AdS black hole with a horizon of constant curvature
k. The boundary matter is an expanding perfect fluid that satisfies the first
law of thermodynamics for all values of the temperature and the spatial
curvature, but it admits a description as a scale-invariant fluid in local
thermal equilibrium only when the inverse Hawking temperature is negligible
compared with the spatial curvature length scale. A Casimir-type term in the
holographic energy-momentum tensor is identified from the threshold of black
hole formation and is shown to take different forms for k>=0 and k<0.Comment: 20 pages. v3: typos corrected. Published versio
Quark-Gluon Plasma - New Frontiers
As implied by organizers, this talk is not a conference summary but rather an
outline of progress/challenges/``frontiers'' of the theory. Some fundamental
questions addressed are:
Why is sQGP such a good liquid? Do we understand (de)confinement and what do
we know about ``magnetic'' objects creating it? Can we understand the AdS/CFT
predictions, from the gauge theory side? Can they be tested experimentally? Can
AdS/CFT duality help us understand rapid equilibration/entropy production? Can
we work out a complete dynamical ``gravity dual'' to heavy ion collisions?Comment: final talk at Quark Matter 2008, Jaipur, India, Feb.200