Critical behavior of active Brownian particles: Connection to field theories

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Thomas Speck
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000809499500005&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1103/PhysRevE.105.064601
eISSN
2470-0053
Externe Identifier
  • Clarivate Analytics Document Solution ID: 2A4UQ
  • PubMed Identifier: 35854575
ISSN
2470-0045
Ausgabe der Veröffentlichung
6
Zeitschrift
PHYSICAL REVIEW E
Artikelnummer
ARTN 064601
Datum der Veröffentlichung
2022
Status
Published
Titel
Critical behavior of active Brownian particles: Connection to field theories
Sub types
  • Article
Ausgabe der Zeitschrift
105

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Autoren
  • Thomas Speck
DOI
10.1103/physreve.105.064601
eISSN
2470-0053
ISSN
2470-0045
Ausgabe der Veröffentlichung
6
Zeitschrift
Physical Review E
Sprache
en
Artikelnummer
064601
Online publication date
2022
Status
Published online
Herausgeber
American Physical Society (APS)
Herausgeber URL
http://dx.doi.org/10.1103/physreve.105.064601
Datum der Datenerfassung
2022
Titel
Critical behavior of active Brownian particles: Connection to field theories
Ausgabe der Zeitschrift
105

Datenquelle: Crossref

Abstract
We explore the relation between active Brownian particles, a minimal particle-based model for active matter, and scalar field theories. Both show a liquid-gas-like phase transition toward stable coexistence of a dense liquid with a dilute active gas that terminates in a critical point. However, a comprehensive mapping between the particle-based model parameters and the effective coefficients governing the field theories has not been established yet. We discuss conflicting recent numerical results for the critical exponents of active Brownian particles in two dimensions. Starting from the intermediate effective hydrodynamic equations, we then present a construction for a scalar order parameter for active Brownian particles that yields the active model B+. We argue that a crucial ingredient is the coupling between density and polarization in the particle current. The renormalization flow close to two dimensions exhibits a pair of perturbative fixed points that limit the attractive basin of the Wilson-Fisher fixed point, with the perspective that the critical behavior of active Brownian particles in two dimensions is governed by a strong-coupling fixed point different from Wilson-Fisher and not necessarily corresponding to Ising universality.
Addresses
  • Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany.
Autoren
  • Thomas Speck
DOI
10.1103/physreve.105.064601
eISSN
2470-0053
Externe Identifier
  • PubMed Identifier: 35854575
Funding acknowledgements
  • Deutsche Forschungsgemeinschaft: 233630050
Open access
false
ISSN
2470-0045
Ausgabe der Veröffentlichung
6-1
Zeitschrift
Physical review. E
Sprache
eng
Medium
Print
Paginierung
064601
Datum der Veröffentlichung
2022
Status
Published
Datum der Datenerfassung
2022
Titel
Critical behavior of active Brownian particles: Connection to field theories.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
105

Datenquelle: Europe PubMed Central

Abstract
We explore the relation between active Brownian particles, a minimal particle-based model for active matter, and scalar field theories. Both show a liquid-gas-like phase transition toward stable coexistence of a dense liquid with a dilute active gas that terminates in a critical point. However, a comprehensive mapping between the particle-based model parameters and the effective coefficients governing the field theories has not been established yet. We discuss conflicting recent numerical results for the critical exponents of active Brownian particles in two dimensions. Starting from the intermediate effective hydrodynamic equations, we then present a construction for a scalar order parameter for active Brownian particles that yields the active model B+. We argue that a crucial ingredient is the coupling between density and polarization in the particle current. The renormalization flow close to two dimensions exhibits a pair of perturbative fixed points that limit the attractive basin of the Wilson-Fisher fixed point, with the perspective that the critical behavior of active Brownian particles in two dimensions is governed by a strong-coupling fixed point different from Wilson-Fisher and not necessarily corresponding to Ising universality.
Date of acceptance
2022
Autoren
  • Thomas Speck
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/35854575
DOI
10.1103/PhysRevE.105.064601
eISSN
2470-0053
Ausgabe der Veröffentlichung
6-1
Zeitschrift
Phys Rev E
Sprache
eng
Country
United States
Paginierung
064601
Datum der Veröffentlichung
2022
Status
Published
Titel
Critical behavior of active Brownian particles: Connection to field theories.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
105

Datenquelle: PubMed

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