Abstract
We review the nonperturbative renormalization group theory. This approach is based on an exact flow equation of the effective action and it enables us to investigate critical phenomena which cannot be described by perturbative treatments. We first explain the general formulation of this theory and we next demonstrate how it is applied to the pure and random field O(N) models.
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Haga, T. (2019). Nonperturbative Renormalization Group. In: Renormalization Group Analysis of Nonequilibrium Phase Transitions in Driven Disordered Systems. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-13-6171-5_3
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DOI: https://doi.org/10.1007/978-981-13-6171-5_3
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