Run-and-tumble dynamics in a crowded environment: Persistent exclusion process for swimmers
Author
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Soto Bertrán, Rodrigo
Author
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Golestanian, Ramin
es_CL
Admission date
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2014-12-23T12:50:23Z
Available date
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2014-12-23T12:50:23Z
Publication date
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2014
Cita de ítem
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Physical Review E 89, 012706 (2014)
en_US
Identifier
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DOI: 10.1103/PhysRevE.89.012706
Identifier
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https://repositorio.uchile.cl/handle/2250/126763
General note
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Artículo de publicación ISI
en_US
Abstract
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The effect of crowding on the run-and-tumble dynamics of swimmers such as bacteria is studied using a
discrete lattice model of mutually excluding particles that move with constant velocity along a direction that is
randomized at a rate á. In stationary state, the system is found to break into dense clusters in which particles are
trapped or stopped from moving. The characteristic size of these clusters predominantly scales as [alfa]-0.5 in both
one and two dimensions. For a range of densities, due to cooperative effects, the stopping time scales as T1d -0.85
and as T2d -0.8, where Td is the diffusive time associated with the motion of cluster boundaries. Our findings might
be helpful in understanding the early stages of biofilm formation.
en_US
Patrocinador
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This research was supported by FONDECYT Grant No.
1100100 (R.S.), Anillo Grant No. ACT 127 (R.S.), and
Human Frontier Science Program Grant No. RGP0061/2013
(R.G.).