期刊
EUROPEAN PHYSICAL JOURNAL E
卷 37, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1140/epje/i2014-14059-4
关键词
-
资金
- MIUR-FIRB project [RBFR08WDBE]
- European Research Council under the European Union's Seventh Framework Programme [307940]
We solve the problem of first-passage time for run-and-tumble particles in one dimension. Exact expression is derived for the mean first-passage time in the general case, considering external force fields and chemotactic fields, giving rise to space-dependent swim speed and tumble rate. Agreement between theoretical formulae and numerical simulations is obtained in the analyzed case studies -constant and sinusoidal force fields, constant gradient chemotactic field. Reported findings can be useful to get insights into very different phenomena involving active particles, such as bacterial motion in external fields, intracellular transport, cell migration, animal foraging.
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