Depinning transition of self-propelled particles
Fuente:
arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866917861797134336 |
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| author | Straube, Arthur V. Höfling, Felix |
| author_facet | Straube, Arthur V. Höfling, Felix |
| contents | Depinning transitions occur when a threshold force must be applied to drive an otherwise immobile system. For the depinning of colloidal particles from a corrugated landscape, we show how active noise due to self-propulsion impacts the nature of this transition, depending on the speed and the dimensionality $d$ of rotational Brownian motion: the drift velocity exhibits the critical exponent 1/2 for quickly reorienting particles, which changes to $d/2$ for slow ones; in between these limits, the drift varies superexponentially. Different giant diffusion phenomena emerge in the two regimes. Our predictions extend to systems with a saddle-node bifurcation in the presence of a bounded noise. Moreover, our findings suggest that nonlinear responses are a sensitive probe of nonequilibrium behavior in active matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_09150 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Depinning transition of self-propelled particles Straube, Arthur V. Höfling, Felix Soft Condensed Matter Statistical Mechanics Depinning transitions occur when a threshold force must be applied to drive an otherwise immobile system. For the depinning of colloidal particles from a corrugated landscape, we show how active noise due to self-propulsion impacts the nature of this transition, depending on the speed and the dimensionality $d$ of rotational Brownian motion: the drift velocity exhibits the critical exponent 1/2 for quickly reorienting particles, which changes to $d/2$ for slow ones; in between these limits, the drift varies superexponentially. Different giant diffusion phenomena emerge in the two regimes. Our predictions extend to systems with a saddle-node bifurcation in the presence of a bounded noise. Moreover, our findings suggest that nonlinear responses are a sensitive probe of nonequilibrium behavior in active matter. |
| title | Depinning transition of self-propelled particles |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2306.09150 |