---
_id: '14442'
abstract:
- lang: eng
text: In the presence of an obstacle, active particles condensate into a surface
“wetting” layer due to persistent motion. If the obstacle is asymmetric, a rectification
current arises in addition to wetting. Asymmetric geometries are therefore commonly
used to concentrate microorganisms like bacteria and sperms. However, most studies
neglect the fact that biological active matter is diverse, composed of individuals
with distinct self-propulsions. Using simulations, we study a mixture of “fast”
and “slow” active Brownian disks in two dimensions interacting with large half-disk
obstacles. With this prototypical obstacle geometry, we analyze how the stationary
collective behavior depends on the degree of self-propulsion “diversity,” defined
as proportional to the difference between the self-propulsion speeds, while keeping
the average self-propulsion speed fixed. A wetting layer rich in fast particles
arises. The rectification current is amplified by speed diversity due to a superlinear
dependence of rectification on self-propulsion speed, which arises from cooperative
effects. Thus, the total rectification current cannot be obtained from an effective
one-component active fluid with the same average self-propulsion speed, highlighting
the importance of considering diversity in active matter.
acknowledgement: MR-V and RS are supported by Fondecyt Grant No. 1220536 and Millennium
Science Initiative Program NCN19_170D of ANID, Chile. P.d.C. was supported by Scholarships
Nos. 2021/10139-2 and 2022/13872-5 and ICTP-SAIFR Grant No. 2021/14335-0, all granted
by São Paulo Research Foundation (FAPESP), Brazil.
article_number: '95'
article_processing_charge: No
article_type: original
author:
- first_name: Mauricio Nicolas
full_name: Rojas Vega, Mauricio Nicolas
id: 441e7207-f91f-11ec-b67c-9e6fe3d8fd6d
last_name: Rojas Vega
- first_name: Pablo
full_name: De Castro, Pablo
last_name: De Castro
- first_name: Rodrigo
full_name: Soto, Rodrigo
last_name: Soto
citation:
ama: Rojas Vega MN, De Castro P, Soto R. Mixtures of self-propelled particles interacting
with asymmetric obstacles. The European Physical Journal E. 2023;46(10).
doi:10.1140/epje/s10189-023-00354-y
apa: Rojas Vega, M. N., De Castro, P., & Soto, R. (2023). Mixtures of self-propelled
particles interacting with asymmetric obstacles. The European Physical Journal
E. Springer Nature. https://doi.org/10.1140/epje/s10189-023-00354-y
chicago: Rojas Vega, Mauricio Nicolas, Pablo De Castro, and Rodrigo Soto. “Mixtures
of Self-Propelled Particles Interacting with Asymmetric Obstacles.” The European
Physical Journal E. Springer Nature, 2023. https://doi.org/10.1140/epje/s10189-023-00354-y.
ieee: M. N. Rojas Vega, P. De Castro, and R. Soto, “Mixtures of self-propelled particles
interacting with asymmetric obstacles,” The European Physical Journal E,
vol. 46, no. 10. Springer Nature, 2023.
ista: Rojas Vega MN, De Castro P, Soto R. 2023. Mixtures of self-propelled particles
interacting with asymmetric obstacles. The European Physical Journal E. 46(10),
95.
mla: Rojas Vega, Mauricio Nicolas, et al. “Mixtures of Self-Propelled Particles
Interacting with Asymmetric Obstacles.” The European Physical Journal E,
vol. 46, no. 10, 95, Springer Nature, 2023, doi:10.1140/epje/s10189-023-00354-y.
short: M.N. Rojas Vega, P. De Castro, R. Soto, The European Physical Journal E 46
(2023).
date_created: 2023-10-22T22:01:13Z
date_published: 2023-10-01T00:00:00Z
date_updated: 2023-10-31T11:16:41Z
day: '01'
department:
- _id: AnSa
doi: 10.1140/epje/s10189-023-00354-y
external_id:
pmid:
- '37819444'
intvolume: ' 46'
issue: '10'
language:
- iso: eng
month: '10'
oa_version: None
pmid: 1
publication: The European Physical Journal E
publication_identifier:
eissn:
- 1292-895X
issn:
- 1292-8941
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Mixtures of self-propelled particles interacting with asymmetric obstacles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 46
year: '2023'
...
---
_id: '12545'
abstract:
- lang: eng
text: We study active surface wetting using a minimal model of bacteria that takes
into account the intrinsic motility diversity of living matter. A mixture of “fast”
and “slow” self-propelled Brownian particles is considered in the presence of
a wall. The evolution of the wetting layer thickness shows an overshoot before
stationarity and its composition evolves in two stages, equilibrating after a
slow elimination of excess particles. Nonmonotonic evolutions are shown to arise
from delayed avalanches towards the dilute phase combined with the emergence of
a transient particle front.
acknowledgement: 'MR-V and RS are supported by Fondecyt Grant No. 1220536 and ANID
– Millennium Science Initiative Program – NCN19 170D, Chile. PdC is supported by
grant #2021/10139-2, Sao Paulo Research Foundation (FAPESP), Brazil.'
article_number: '014608'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Mauricio Nicolas
full_name: Rojas Vega, Mauricio Nicolas
id: 441e7207-f91f-11ec-b67c-9e6fe3d8fd6d
last_name: Rojas Vega
- first_name: Pablo
full_name: De Castro, Pablo
last_name: De Castro
- first_name: Rodrigo
full_name: Soto, Rodrigo
last_name: Soto
citation:
ama: Rojas Vega MN, De Castro P, Soto R. Wetting dynamics by mixtures of fast and
slow self-propelled particles. Physical Review E. 2023;107(1). doi:10.1103/PhysRevE.107.014608
apa: Rojas Vega, M. N., De Castro, P., & Soto, R. (2023). Wetting dynamics by
mixtures of fast and slow self-propelled particles. Physical Review E.
American Physical Society. https://doi.org/10.1103/PhysRevE.107.014608
chicago: Rojas Vega, Mauricio Nicolas, Pablo De Castro, and Rodrigo Soto. “Wetting
Dynamics by Mixtures of Fast and Slow Self-Propelled Particles.” Physical Review
E. American Physical Society, 2023. https://doi.org/10.1103/PhysRevE.107.014608.
ieee: M. N. Rojas Vega, P. De Castro, and R. Soto, “Wetting dynamics by mixtures
of fast and slow self-propelled particles,” Physical Review E, vol. 107,
no. 1. American Physical Society, 2023.
ista: Rojas Vega MN, De Castro P, Soto R. 2023. Wetting dynamics by mixtures of
fast and slow self-propelled particles. Physical Review E. 107(1), 014608.
mla: Rojas Vega, Mauricio Nicolas, et al. “Wetting Dynamics by Mixtures of Fast
and Slow Self-Propelled Particles.” Physical Review E, vol. 107, no. 1,
014608, American Physical Society, 2023, doi:10.1103/PhysRevE.107.014608.
short: M.N. Rojas Vega, P. De Castro, R. Soto, Physical Review E 107 (2023).
date_created: 2023-02-12T23:00:59Z
date_published: 2023-01-24T00:00:00Z
date_updated: 2023-08-01T13:09:45Z
day: '24'
department:
- _id: GradSch
doi: 10.1103/PhysRevE.107.014608
external_id:
arxiv:
- '2301.01856'
isi:
- '000963909800006'
intvolume: ' 107'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2301.01856
month: '01'
oa: 1
oa_version: Preprint
publication: Physical Review E
publication_identifier:
eissn:
- 2470-0053
issn:
- 2470-0045
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Wetting dynamics by mixtures of fast and slow self-propelled particles
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...