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arXiv:1109.1377 · International Journal of Modern Physics B

DOMAIN WALL RENORMALIZATION GROUP ANALYSIS OF TWO-DIMENSIONAL ISING MODEL

KEN-ICHI AOKI, TAMAO KOBAYASHI, HIROSHI TOMITA

Published Jul 20, 2009• 5 citations
arXivHTMLPDF

Abstract

Using a recently proposed new renormalization group method (tensor renormalization group), we analyze the Ising model on the two-dimensional square lattice. For the lowest-order approximation with two-domain wall states, it realizes the idea of coarse graining of domain walls. We write down explicit analytic renormalization transformation and prove that the picture of the coarse graining of the physical domain walls does hold for all physical renormalization group flows. We solve it to get the fixed point structure and obtain the critical exponents and the critical temperature. These results are very near to the exact values. We also briefly report the improvement using four-domain wall states.

DOI
10.1142/s0217979209053357

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