Crossover scaling functions and an extended minimal subtraction scheme

Erwin Frey

Physica A: Statistical Mechanics and its Applications, 1995, vol. 221, issue 1, 52-67

Abstract: A field theoretic renormalization-group method is presented which is capable of dealing with crossover problems associated with a change in the upper critical dimension. The method leads to flow functions for the parameters and coupling constants of the model which depend on the set of parameters that characterize the fixed point landscape of the underlying problem. Similar to Nelson's trajectory integral method, any vertex function can be expressed as a line integral along a renormalization-group trajectory, which in the field theoretic formulation are given by the characteristics of the corresponding Callan-Symanzik equation. The field theoretic renormalization automatically leads to a separation of the regular and singular parts of all crossover scaling functions.

Date: 1995
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:221:y:1995:i:1:p:52-67

DOI: 10.1016/0378-4371(95)00223-T

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