Gupta, RK and Kant, R and Soni, H and Sood, AK and Ramaswamy, S (2022) Active nonreciprocal attraction between motile particles in an elastic medium. In: Physical Review E, 105 (5).
|
PDF
act_non_105_5_2022.pdf - Published Version Download (2MB) | Preview |
Abstract
We show from experiments and simulations on vibration-activated granular matter that self-propelled polar rods in an elastic medium on a substrate turn and move towards each other. We account for this effective attraction through a coarse-grained theory of a motile particle as a moving point-force density that creates elastic strains in the medium that reorient other particles. Our measurements confirm qualitatively the predicted features of the distortions created by the rods, including the |x|-1/2 tail of the trailing displacement field and nonreciprocal sensing and pursuit. A discrepancy between the magnitudes of displacements along and transverse to the direction of motion remains. Our theory should be of relevance to the interaction of motile cells in the extracellular matrix or in a supported layer of gel or tissue. © 2022 American Physical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Physical Review E |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to the authors. |
| Keywords: | Coarse-grained; Direction of motion; Displacement field; Elastic medium; Elastic-strains; Force density; Granular matter; Nonreciprocal; Point force; Polar rods, Strain, article; extracellular matrix; simulation; vibration |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 07 Sep 2022 16:03 |
| Last Modified: | 07 Sep 2022 16:03 |
| URI: | https://eprints.iisc.ac.in/id/eprint/76541 |
Actions (login required)
 |
View Item |
