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2008

Renormalisation of out-of-equilibrium quantum fields

Borsanyi, Szabolcs, Reinosa, Urko

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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 arXiv:0809.0496.

Renormalisation of out-of-equilibrium quantum fields · Around

Built on

G. Baym, Phys. Rev. 127
1974
Earlier work this paper cites.
J. Berges, S. Borsányi and J. Serreau, Nucl. Phys. B 660
2003
Earlier work this paper cites.
J. Berges and J. Cox, Phys. Lett. B 517
2005
Earlier work this paper cites.

Similar

U. Reinosa, Nucl. Phys. A 772
2006
Cited alongside, same era.
H. van Hees and J. Knoll, Phys. Rev. D 65
2007
Cited alongside, same era.
Sz. Borsányi and U. Reinosa, arXiv:0809.0496
Original
Cited in the paper.

Then

J. Berges and J. Serreau, Phys. Rev. Lett. 91
2008
Closest in time.
U. Reinosa and J. Serreau, JHEP 0607
2008
Closest in time.

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