Some relation between spectral dimension and Ahlfors regular conformal dimension on infinite graphs

Abstract

The spectral dimension $d_s$ of a weighted graph is an exponent associated with the asymptotic behavior of the random walk on the graph. The Ahlfors regular conformal dimension $\dim_\mathrm{ARC}$ of the graph distance is a quasisymmetric invariant, where quasisymmetry is a well-studied property of homeomorphisms between metric spaces. In this paper, we give a typical example of a fractal-like graph with $d_s<\dim_\mathrm{ARC}<2$ and prove a sufficient condition for $\dim_\mathrm{ARC}\le d_s<2.$