Optimized Perturbation Theory:. Finite Temperature Applications

Details Optimized Perturbation Theory:. Finite Temperature Applications Optimized Perturbation Theory:. Finite Temperature Applications

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ranp.conf..147p&link_type=abstract

RELATIVISTIC ASPECTS OF NUCLEAR PHYSICS. Proceedings of the Sixth International Workshop. Held 17-20 October 2000 in Caraguatatu

Physics

Nuclear Physics

Scientific paper

We review the optimized perturbation theory (or linear δ-expansion) illustrating with an application to the anharmonic oscillator. We then apply the method to multi-field O(N1) × O(N2) scalar theories at high temperatures to investigate the possibility of inverse symmetry breaking (or symmetry non restoration). Our results support inverse symmetry breaking and reveal the possibility of other high temperature symmetry breaking patterns for which the last term in the breaking sequence is O(N1 - 1) × O(N2 - 1).

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