Scaling contributions to the free energy in the 1/n expansion of O(n) nonlinear sigma models in d-dimensions
Abstract
Within the 1/N expansion of O(N) nonlinear σ models for d<=4 it is possible to separate consistently the spin-wave and the massive-mode contributions to the scaling part of the free energy near criticality, and to evaluate them to O(1/N). For critical dimensions d=2+2/n the Abe-Hikami anomaly is recovered, while for d=2 the removal of the spin-wave term is justified.
- Publication:
-
Physics Letters B
- Pub Date:
- February 1998
- DOI:
- arXiv:
- arXiv:hep-lat/9710041
- Bibcode:
- 1998PhLB..420..314D
- Keywords:
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- High Energy Physics - Lattice;
- Condensed Matter;
- High Energy Physics - Theory
- E-Print:
- 10 pages, Latex, one figure, submitted to Phys. Lett. B