Modeling a self-propelled autochemotactic walker.
Modeling a self-propelled autochemotactic walker.
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模拟自走式趋化步行器
DOI:
10.1103/physreve.84.041924
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
H. Stark
中科院分区:
文献类型:
--
作者:
J. Taktikos;V. Zaburdaev;H. Stark
We develop a minimal model for the stochastic dynamics of microorganisms where individuals communicate via autochemotaxis. This means that microorganisms, such as bacteria, amoebae, or cells, follow the gradient of a chemical that they produce themselves to attract or repel each other. A microorganism is represented as a self-propelled particle or walker with constant speed while its velocity direction diffuses on the unit circle. We study the autochemotactic response of a single self-propelled walker whose dynamics is non-Markovian. We show that its long-time dynamics is always diffusive by deriving analytic expressions for its diffusion coefficient in the weak- and strong-coupling case. We confirm our findings by numerical simulations.
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