Journal
NUCLEAR PHYSICS A
Volume 820, Issue -, Pages 147C-150CPublisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2009.01.036
Keywords
Renormalisation; Fields out-of-equilibrium; 2PI effective action
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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 [1].
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