DISCOVERY-HET-Seminar

Speaker: Anders Tranberg, NBIA and DISCOVERY CENTER

Title: Quantum fields and expanding Universes

Abstract: In the very early Universe, most interesting physics took place during and near various phase transitions: The QCD transition, the Electroweak transition, Inflation, Reheating, SUSY-breaking, GUT breaking. In this context, matter must be described as interacting quantum fields, often out of thermal equilibrium. This requires numerical simulations.

I will briefly introduce the main obstacles to simulating fields in expanding backgrounds, and then describe an implementation of truly quantum dynamics based on the real-time Schwinger-Dyson (or Kadanoff-Baym) equation and the 2PI effective action.