English

Diffusive geodesics wandering in networks of rigid chains

Disordered Systems and Neural Networks 2025-12-05 v1 Statistical Mechanics Probability

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 ξ=1/2\xi = 1/2, and a travel-time fluctuation exponent χ=0\chi = 0, consistent with the KPZ relation, yet violating the bound~χ1/8\chi\geq1/8 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.

Keywords

Cite

@article{arxiv.2512.04682,
  title  = {Diffusive geodesics wandering in networks of rigid chains},
  author = {Ulysse Marquis},
  journal= {arXiv preprint arXiv:2512.04682},
  year   = {2025}
}

Comments

19 pages (main text + appendix), respectively 6 and 11 figures, accepted at Phys. Rev. E

R2 v1 2026-07-01T08:09:16.617Z