Heat Kernel Estimates for Random Walks with Killing on Transient Graphs

Source abstract

We give matching two-sided estimates for heat kernels obtained from Schrödinger operators $Δ+W$ on weighted graphs. The graphs we consider are transient and admit two-sided sub-Gaussian heat kernel estimates for the Laplacian $Δ$, and the potentials $W$ decay to zero at infinity. We offer two proofs for one of our main results: one using the Feynman-Kac formula, and one without using it. Our results apply to fractal-type graphs such as graphical Sierpinski carpets, among other examples.