Active gel segment behaving as an active particle

A - Papers appearing in refereed journals

Recho, P., Putelat, T. and Truskinovsky, L. 2019. Active gel segment behaving as an active particle. Physical Review E. 100, p. 062403.

AuthorsRecho, P., Putelat, T. and Truskinovsky, L.

We reduce a one-dimensional model of an active segment (AS), which is used, for instance, in the description of contraction-driven cell motility, to a zero-dimensional model of an active particle (AP) characterized by two internal degrees of freedom: position and polarity. Both models give rise to hysteretic force-velocity relations showing that an active agent can support two opposite polarities under the same external force and that it can maintain the same polarity while being dragged by external forces with opposite orientations. This double bistability results in a rich dynamic repertoire which we illustrate by studying static, stalled, motile, and periodically repolarizing regimes displayed by an active agent confined in a viscoelastic environment. We show that the AS and AP models can be calibrated to generate quantitatively similar dynamic responses.

Year of Publication2019
JournalPhysical Review E
Journal citation100, p. 062403
Digital Object Identifier (DOI)doi:10.1103/PhysRevE.100.062403
Web address (URL)
Open accessPublished as non-open access
FunderEngineering and Physical Sciences Research Council
Funder project or codeEngineering Nonlinearity
Output statusPublished
Publication dates
Online04 Dec 2019
Publication process dates
Accepted05 Nov 2019
PublisherAmerican Physical Society (APS)

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