Renormalisation of out-of-equilibrium quantum fields

Details Renormalisation of out-of-equilibrium quantum fields Renormalisation of out-of-equilibrium quantum fields

2008-10-23

arxiv.org/abs/0810.4262v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

To appear in the proceedings of SEWM08, Amsterdam, The Netherlands, 26-29 August 2008

Scientific paper

10.1016/j.nuclphysa.2009.01.036

We consider the initial value problem and its renormalisation in the framework of the two-particle-irreducible (2PI) effective action. We argue that in the case of appropriately chosen self-consistent initial conditions, the counterterms needed to renormalise the system in equilibrium are also sufficient to renormalise its time evolution. In this way we improve on Gaussian initial conditions which have the disadvantage of generically not showing a continuum limit. For a more detailed discussion see arXiv:0809.0496.

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