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Morphological instability and negative geometric friction from contact with active and driven particles
Abstract
Overdamped particles on a deformable substrate induce a geometric friction through their response to metric perturbations. Nonequilibrium dynamics couples such a perturbation to kinetic effects, which can flip that friction negative, softening the substrate's rigidity and favoring invaginations and evaginations. A breathing circle, with local curvature radius as dynamical variable, is the main example. At equilibrium the friction reduces to an ordinary potential response and stays positive. Geometric response emerges as a new route by which active and driven matter reshape their environment.
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BibTeX
@misc{maleki2026morphological,
title = {{Morphological instability and negative geometric friction from contact with active and driven particles}},
author = {Forouh Maleki and Christian Maes},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.29902},
eprint = {2610.29902},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.29902},
}
RIS
TY - UNPB
TI - Morphological instability and negative geometric friction from contact with active and driven particles
AU - Forouh Maleki
AU - Christian Maes
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2610.29902
UR - https://arxiv.org/abs/2610.29902
AB - Overdamped particles on a deformable substrate induce a geometric friction through their response to metric perturbations. Nonequilibrium dynamics couples such a perturbation to kinetic effects, which can flip that friction negative, softening the substrate's rigidity and favoring invaginations and evaginations. A breathing circle, with local curvature radius as dynamical variable, is the main example. At equilibrium the friction reduces to an ordinary potential response and stays positive. Geometric response emerges as a new route by which active and driven matter reshape their environment.
ER -