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Renormalisation of out-of-equilibrium quantum fields

✍ Scribed by Sz. Borsányi; U. Reinosa

Book ID
103866466
Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
241 KB
Volume
820
Category
Article
ISSN
0375-9474

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✦ Synopsis

We consider the initial value problem and its renormalisation in the framework of the twoparticle-irreducible (2PI) effective action. We argue that in the case of appropriately chosen selfconsistent 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 [1].

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