$1/N$ Expansion of Two-Dimensional Models in the Scaling Region

The main technical and conceptual features of the lattice $1 / N$ expansion in the scaling region are discussed in the context of a two-parameter two-dimensional spin model interpolating between $C P^{N - 1}$ and $O (2 N)$ $σ$ models, with standard and improved lattice actions. We show how to perform the asymptotic expansion of effective propagators for small values of the mass gap and how to employ this result in the evaluation of physical quantities in the scaling regime. The lattice renormalization group $β$ function is constructed explicitly and exactly to $O (1 / N)$ .

$1 / N$ Expansion of Two-Dimensional Models in the Scaling Region

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$1 / N$ Expansion of Two-Dimensional Models in the Scaling Region

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1/N1/N Expansion of Two-Dimensional Models in the Scaling Region

文献摘要

讨论

|讲解博客

|AI智能校验

1/N1/N Expansion of Two-Dimensional Models in the Scaling Region

文献摘要

讨论

|讲解博客

|AI智能校验

$1 / N$ Expansion of Two-Dimensional Models in the Scaling Region

讲解博客

AI智能校验

$1 / N$ Expansion of Two-Dimensional Models in the Scaling Region

讲解博客

AI智能校验