Abstract: We initiate the study on chemical distances of percolation clusters for level sets of twodimensional discrete Gaussian free fields as well as loop clusters generated by two-dimensional random walk loop soups. One of our results states that the chemical distance between two macroscopic annuli away from the boundary for the random walk loop soup at the critical intensity is of dimension 1 with positive probability. Our proof method is based on an interesting combination of a theorem of Makarov, isomorphism theory and an entropic repulsion estimate for Gaussian free fields in the presence of a hard wall.
Finally, REF also established the chemical distance for critical random walk loop soup clusters.
Chemical distances for percolation of planar Gaussian free fields and critical random walk loop soups
arXiv: Probability
Mathematics