Emergent organization and polarization due to active fluctuations
We introduce and study a model of active Brownian motion with multiplicative noise describing fluctuations in the self-propulsion or activity. We find that the standard picture of density accumulation in slow regions is qualitatively modified by active fluctuations, as stationary density profiles ar...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-04-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.L022012 |
| _version_ | 1797210530473050112 |
|---|---|
| author | Benoît Mahault Prakhar Godara Ramin Golestanian |
| author_facet | Benoît Mahault Prakhar Godara Ramin Golestanian |
| author_sort | Benoît Mahault |
| collection | DOAJ |
| description | We introduce and study a model of active Brownian motion with multiplicative noise describing fluctuations in the self-propulsion or activity. We find that the standard picture of density accumulation in slow regions is qualitatively modified by active fluctuations, as stationary density profiles are generally not determined only by the mean self-propulsion speed landscape. As a result, activity gradients generically correlate the particle self-propulsion speed and orientation, leading to emergent polarization at interfaces pointing either towards dense or dilute regions depending on the amount of noise in the system. We discuss how active noise affects the emergence of motility-induced phase separation. Our work provides a foundation for systematic studies of active matter self-organization in the presence of activity landscapes and active fluctuations. |
| first_indexed | 2024-04-24T10:12:04Z |
| format | Article |
| id | doaj.art-afc4fb2af5ee414cbdc26e74e93f432b |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:12:04Z |
| publishDate | 2023-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-afc4fb2af5ee414cbdc26e74e93f432b2024-04-12T17:30:06ZengAmerican Physical SocietyPhysical Review Research2643-15642023-04-0152L02201210.1103/PhysRevResearch.5.L022012Emergent organization and polarization due to active fluctuationsBenoît MahaultPrakhar GodaraRamin GolestanianWe introduce and study a model of active Brownian motion with multiplicative noise describing fluctuations in the self-propulsion or activity. We find that the standard picture of density accumulation in slow regions is qualitatively modified by active fluctuations, as stationary density profiles are generally not determined only by the mean self-propulsion speed landscape. As a result, activity gradients generically correlate the particle self-propulsion speed and orientation, leading to emergent polarization at interfaces pointing either towards dense or dilute regions depending on the amount of noise in the system. We discuss how active noise affects the emergence of motility-induced phase separation. Our work provides a foundation for systematic studies of active matter self-organization in the presence of activity landscapes and active fluctuations.http://doi.org/10.1103/PhysRevResearch.5.L022012 |
| spellingShingle | Benoît Mahault Prakhar Godara Ramin Golestanian Emergent organization and polarization due to active fluctuations Physical Review Research |
| title | Emergent organization and polarization due to active fluctuations |
| title_full | Emergent organization and polarization due to active fluctuations |
| title_fullStr | Emergent organization and polarization due to active fluctuations |
| title_full_unstemmed | Emergent organization and polarization due to active fluctuations |
| title_short | Emergent organization and polarization due to active fluctuations |
| title_sort | emergent organization and polarization due to active fluctuations |
| url | http://doi.org/10.1103/PhysRevResearch.5.L022012 |
| work_keys_str_mv | AT benoitmahault emergentorganizationandpolarizationduetoactivefluctuations AT prakhargodara emergentorganizationandpolarizationduetoactivefluctuations AT ramingolestanian emergentorganizationandpolarizationduetoactivefluctuations |