Journal Article

FZJ-2022-02205

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Path integral description of semiflexible active Brownian polymers

Eisenstecken, T. ; Winkler, R. G. (Corresponding author)FZJ*

2022
American Institute of Physics Melville, NY

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/31278  doi:10.1063/5.0081020

Abstract: Semiflexible polymers comprised of active Brownian particles (ABPOs) exhibit intriguing activity-driven conformational and dynamical features. Analytically, the generic properties of ABPOs can be obtained in a mean-field description applying the Gaussian semiflexi- ble polymer model. In this article, we derive a path integral representation of the stationary-state distribution function of such ABPOs, based on the stationary-state distribution function of the normal mode amplitudes following from the Langevin equation of motion. The path integral includes characteristic semiflexible polymer contributions from entropy and bending energy, with activity depen- dent coefficients, and, in addition, activity-induced torsional and higher order correlations along the polymer contour. Focusing on a semiflexible polymer approximation, we determine various properties such as the tangent-vector correlation function, effective persis- tence length, and the mean-square end-to-end distance. The latter reflects the characteristic features of ABPOs, and good quantitative agreement is obtained with the full solution for larger activities, specifically for flexible polymers. Moreover, the approximation indi- cates the relevance of torsional and higher order contour correlations for the ABPO conformations. In general, the ABPO path integral illustrates how colored noise (active fluctuations) affects semiflexible polymer conformations in comparison to white noise thermal fluctuations.

---

Contributing Institute(s):

1. Theorie der Weichen Materie und Biophysik (IAS-2)
2. Theoretische Physik der Lebenden Materie (IBI-5)
3. JARA-SOFT (JARA-SOFT)

Research Program(s):

1. 5243 - Information Processing in Distributed Systems (POF4-524) (POF4-524)

Appears in the scientific report 2022

---

Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---