2PI simulations in expanding backgrounds: Doing it anyway!

Details 2PI simulations in expanding backgrounds: Doing it anyway! 2PI simulations in expanding backgrounds: Doing it anyway!

2008-10-16

arxiv.org/abs/0810.2887v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/j.nuclphysa.2009.01.048

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.

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