Equations of State for Nonlinear Sigma-Models II: Relations between Resummation Schemes, and Crossover Phenomena

Details Equations of State for Nonlinear Sigma-Models II: Relations between Resummation Schemes, and Crossover Phenomena Equations of State for Nonlinear Sigma-Models II: Relations between Resummation Schemes, and Crossover Phenomena

1994-12-23

arxiv.org/abs/cond-mat/9412105v1

Nucl.Phys. B441 (1995) 549-561

Physics

Condensed Matter

14pp., REVTeX, 1 figure

Scientific paper

10.1016/0550-3213(95)00104-Z

It is shown how a recent method to systematically extrapolate and resum the loop expansion for nonlinear sigma-models is related to solutions of the renormalization group equation. This relation is used to generalize the explicit equations of state obtained previously to models which display crossover phenomena. As an example we discuss Wegner's localization model and consider the crossover from symplectic to unitary symmetry.

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