Random walks of intermittently self-propelled particles
Motivated by various recent experimental findings, we propose a dynamical model of intermittently self-propelled particles: active particles that recurrently switch between two modes of motion, namely an active run state and a turn state, in which self-propulsion is absent. The durations of these mo...
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-12-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.043281 |
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| _version_ | 1846119942148063232 |
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| author | Agniva Datta Carsten Beta Robert Großmann |
| author_facet | Agniva Datta Carsten Beta Robert Großmann |
| author_sort | Agniva Datta |
| collection | DOAJ |
| description | Motivated by various recent experimental findings, we propose a dynamical model of intermittently self-propelled particles: active particles that recurrently switch between two modes of motion, namely an active run state and a turn state, in which self-propulsion is absent. The durations of these motility modes are drawn from arbitrary waiting-time distributions. We derive the expressions for exact forms of transport characteristics like mean-square displacements and diffusion coefficients to describe such processes. Furthermore, the conditions for the emergence of sub- and superdiffusion in the long-time limit are presented. We give examples of some important processes that occur as limiting cases of our system, including run-and-tumble motion of bacteria, Lévy walks, hop-and-trap dynamics, intermittent diffusion and continuous-time random walks. |
| format | Article |
| id | doaj-art-ae3dae49080b4ab0a9fa59e4a643c81c |
| institution | Kabale University |
| issn | 2643-1564 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-ae3dae49080b4ab0a9fa59e4a643c81c2024-12-16T15:01:03ZengAmerican Physical SocietyPhysical Review Research2643-15642024-12-016404328110.1103/PhysRevResearch.6.043281Random walks of intermittently self-propelled particlesAgniva DattaCarsten BetaRobert GroßmannMotivated by various recent experimental findings, we propose a dynamical model of intermittently self-propelled particles: active particles that recurrently switch between two modes of motion, namely an active run state and a turn state, in which self-propulsion is absent. The durations of these motility modes are drawn from arbitrary waiting-time distributions. We derive the expressions for exact forms of transport characteristics like mean-square displacements and diffusion coefficients to describe such processes. Furthermore, the conditions for the emergence of sub- and superdiffusion in the long-time limit are presented. We give examples of some important processes that occur as limiting cases of our system, including run-and-tumble motion of bacteria, Lévy walks, hop-and-trap dynamics, intermittent diffusion and continuous-time random walks.http://doi.org/10.1103/PhysRevResearch.6.043281 |
| spellingShingle | Agniva Datta Carsten Beta Robert Großmann Random walks of intermittently self-propelled particles Physical Review Research |
| title | Random walks of intermittently self-propelled particles |
| title_full | Random walks of intermittently self-propelled particles |
| title_fullStr | Random walks of intermittently self-propelled particles |
| title_full_unstemmed | Random walks of intermittently self-propelled particles |
| title_short | Random walks of intermittently self-propelled particles |
| title_sort | random walks of intermittently self propelled particles |
| url | http://doi.org/10.1103/PhysRevResearch.6.043281 |
| work_keys_str_mv | AT agnivadatta randomwalksofintermittentlyselfpropelledparticles AT carstenbeta randomwalksofintermittentlyselfpropelledparticles AT robertgroßmann randomwalksofintermittentlyselfpropelledparticles |