Delta Expansion on the Lattice and Dilated Scaling Region

Details Delta Expansion on the Lattice and Dilated Scaling Region Delta Expansion on the Lattice and Dilated Scaling Region

2008-02-27

arxiv.org/abs/0802.3952v1

Phys.Rev.D76:045007,2007

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages, 18 figures

Scientific paper

10.1103/PhysRevD.76.045007

A new kind of delta expansion is applied on the lattice to the d=2 non-linear sigma model at N=infinity and N=1 which corresponds to the Ising model. We introduce the parameter delta for the dilation of the scaling region of the model with the replacement of the lattice spacing a to (1-delta)^{1/2}a. Then, we demonstrate that the expansion in delta admits an approximation of the scaling behavior of the model at both limits of N from the information at a large lattice spacing a.

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