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Effective Action Method for Computing Next to Leading Corrections of $O(N)$ Models

D. Dominici·U. Marini Bettolo Marconi
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Abstract

We compute the corrections of next to leading order in the ${1 \over N}$ expansion to the effective potential of a system described by a Ginzburg-Landau model with $N$ components and quartic interaction, in the case of spontaneous symmetry breaking. The method we apply allows to generalize in a simple way the so-called Self-Consistent Screened Approximation (SCSA).

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D. Dominici, U. Marini Bettolo Marconi. 1993-11-05. Effective Action Method for Computing Next to Leading Corrections of $O(N)$ Models. https://doi.org/10.1016/0370-2693(93)90798-m

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