Critical phenomena from the two-particle irreducible 1/N expansion

Alford, M., Berges, J. and Cheyne, J.M. (2004) Critical phenomena from the two-particle irreducible 1/N expansion. Physical Review D, 70, (doi:10.1103/PhysRevD.70.125002)

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Abstract

The 1/N expansion of the two-particle irreducible (2PI) effective action is employed to compute universal properties at the 2nd order phase transition of an O(N)-symmetric N-vector model directly in three-dimensions. At next-to-leading-order the approach cures the spurious small-N divergence of the standard (1PI) 1/N expansion for a computation of the critical anomalous dimension η(N), and leads to improved estimates already for moderate values of N.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:UNSPECIFIED
Authors: Alford, M., Berges, J., and Cheyne, J.M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1089-4918

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