DISCOVERY-Seminar – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > 2011 > DISCOVERY-Seminar


Speaker: Raju Venugopalan, Stony Brook U.

Title: The initial spectrum of fluctuations in the little bang

We discuss an ab initio computation of the initial spectrum of quantum fluctuations in the pre-equilibrium Glasma formed in heavy ion collisions.

Our result resums to all loop orders the leading unstable quantum fluctuations at early times. Previously, for a scalar field theory, we showed that averaging over the analogous spectrum of initial fluctuations leads to perfect fluid hydrodynamic behavior.

The computation can now be carried out for QCD and we sketch the algorithm for doing so. We suggest that our framework provides a good test of Berry's conjecture for the thermalization of quantum systems. In addition to providing a mechanism for early thermalization, our result for the small fluctuation spectrum also provides one with an essential ingredient in computing a) key features of jet modification at early times and b) sphaleron transition rates in the Glasma.