Two fluctuating interfaces with sticking interactions: Invariant measures and dynamics
Abstract
We introduce and study a non-equilibrium stochastic model of two fluctuating interfaces which interact through short-range attractive interactions at their points of contact. Beginning from an entangled state, the system exhibits diverse dynamics -- ranging from fast transients with small lifetimes to ultraslow evolution through quasi-stationary states -- and reaches stuck, entangled, or detached steady states. Near the stuck-detached transition, two distinct dynamical modes of evolution co-occur. When the two surfaces evolve through similar dynamics (both Edwards-Wilkinson or both Kardar-Parisi-Zhang), the invariant measure is determined and found to have an inhomogeneous product form. This exact steady state is shown to be the measure of the equilibrium Poland-Scheraga model of DNA denaturation.
Cite
@article{arxiv.2507.20350,
title = {Two fluctuating interfaces with sticking interactions: Invariant measures and dynamics},
author = {Samvit Mahapatra and Malay Bandyopadhyay and Mustansir Barma},
journal= {arXiv preprint arXiv:2507.20350},
year = {2025}
}
Comments
5+2 pages, 7 figures, 5 pages supplemental materials