2PI simulations in expanding backgrounds: Doing it anyway!

Abstract

I set out the 2PI formalism for quantum fields in a Friedmann-Robertson-Walker Universe. I show how one can solve self-consistently for the quantum field evolution and the evolution of the cosmological scale factor, using a renormalised semi-classical Friedmann equation. In a 2PI coupling expansion truncated at O(lambda^2), I perform sample calculations demonstrating kinetic and chemical equilibration in this context.

4 pages, 5 figures, to appear in the Proceedings of SEWM08, Amsterdam, the Netherlands, August 26-29, 2008

References in corpus (6)

• Quantum dynamics and thermalization for out-of-equilibrium phi^4-theory
• Equilibration in phi^4 theory in 3+1 dimensions
• Short distance and initial state effects in inflation: stress tensor and decoherence
• Quantum field thermalization in expanding backgrounds
• Looking for defects in the 2PI correlator
• Thermal effects on slow-roll dynamics

Cited by in corpus (2)

• Foamy Dark Matter from Monodromies
• Entropy current for the relativistic Kadanoff-Baym equation and H-theorem in $O(N)$ theory with NLO self-energy of $1/N$ expansion