Sengupta Ankush, van Teeffelen Sven, Löwen Hartmut
Institut für Theoretische Physik II, Weiche Materie, Heinrich-Heine-Universität, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Sep;80(3 Pt 1):031122. doi: 10.1103/PhysRevE.80.031122. Epub 2009 Sep 17.
The Brownian dynamics of a single microorganism coupled by chemotaxis to a diffusing concentration field that 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.
通过计算机模拟研究了在空间维度d = 1、2、3中，单个微生物通过趋化作用与自身分泌的扩散浓度场耦合的布朗动力学。讨论了趋化剂和趋化抑制剂两种情况。对于趋化剂，我们发现存在一个短暂的动力学停滞，直到微生物长时间扩散。对于趋化抑制剂，在所有维度上都存在短暂的弹道运动和长时间的扩散。借助理论分析对这些结果进行了解释。
