Diffusive geodesics wandering in networks of rigid chains
Phys. Rev. E 112, 064316 – Published 24 December, 2025
DOI: https://doi.org/10.1103/d6y6-j48y
Abstract
We introduce an ensemble of spatial networks built from the junctions of hindered-rotation chains, incorporating directional correlations between bonds, an aspect ignored in the standard network modeling paradigm. The emergent random networks support geodesics with a wandering exponent , and a travel-time fluctuation exponent , consistent with the KPZ relation, yet violating the bound predicted in the Poissonian framework. Transverse deviations follow the Kolmogorov distribution, indicating similarities between Brownian bridge excursions and geodesics in a random medium with correlated edges orientations. These results reveal a new universality class of Euclidean first-passage percolation, where local orientational memory reshapes transport properties and challenges existing bounds for random spatial networks.