Dynamics of a microorganism moving by chemotaxis in its own secretion

Details Dynamics of a microorganism moving by chemotaxis in its own secretion Dynamics of a microorganism moving by chemotaxis in its own secretion

2009-05-08

arxiv.org/abs/0905.1316v2

Phys. Rev. E, 80, 031122 (2009)

Physics

Condensed Matter

Soft Condensed Matter

10 pages and 5 figures (Revised and improved version)

Scientific paper

The Brownian dynamics of a single microorganism coupled by chemotaxis to a diffusing concentration field which is secreted by the microorganism itself is studied by computer simulations in spatial dimensions $d=1,2,3$. Both cases of a chemoattractant and a chemorepellent are discussed. For a chemoattractant, we find a transient dynamical arrest until the microorganism diffuses for long times. For a chemorepellent, there is a transient ballistic motion in all dimensions and a long-time diffusion. These results are interpreted with the help of a theoretical analysis.

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