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- W3155018849 abstract "We study analytically how noninteracting weakly active particles, for which passive Brownian diffusion cannot be neglected and activity can be treated perturbatively, distribute and behave near boundaries in various geometries. In particular, we develop a perturbative approach for the model of active particles driven by an exponentially correlated random force (active Ornstein-Uhlenbeck particles). This approach involves a relatively simple expansion of the distribution in powers of the P'{e}clet number and in terms of Hermite polynomials. We use this approach to cleanly formulate boundary conditions, which allows us to study weakly active particles in several geometries: confinement by a single wall or between two walls in 1D, confinement in a circular or wedge-shaped region in 2D, motion near a corrugated boundary, and finally absorption onto a sphere. We consider how quantities such as the density, pressure, and flow of the active particles change as we gradually increase the activity away from a purely passive system. These results for the limit of weak activity help us gain insight into how active particles behave in the presence of various types of boundaries." @default.
- W3155018849 created "2021-04-26" @default.
- W3155018849 creator A5011978444 @default.
- W3155018849 date "2021-04-26" @default.
- W3155018849 modified "2023-10-14" @default.
- W3155018849 title "Effect of boundaries on noninteracting weakly active particles in different geometries" @default.
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- W3155018849 doi "https://doi.org/10.1103/physreve.103.042609" @default.
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