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arXiv · 2512.04682

Diffusive geodesics wandering in networks of rigid chains

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

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Ulysse Marquis. 2025-12-04. Diffusive geodesics wandering in networks of rigid chains. https://doi.org/10.1103/d6y6-j48y

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