• Accepted Paper

Spin quantum Hall transition on random networks: Exact critical exponents via quantum gravity

Esteban Macías, Ilya Gruzberg, and Eldad Bettelheim

Phys. Rev. B - Accepted 9 September, 2026

DOI: https://doi.org/10.1103/y7pg-4bvt

Abstract

We solve the problem of the spin quantum Hall transition on random networks by mapping it to a loop model. Using tools of two-dimensional quantum gravity, we compute critical exponents that characterize this transition and confirm that these are related to the exponents for the regular (square) network through the KPZ relation. Our results demonstrate the relevance of the geometric randomness of the networks and support conclusions of numerical simulations of random networks for the integer quantum Hall transition.

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