| Title |
Non-equilibrium tracer dynamics in oscillating active gel |
|
Authors |
Rosario Reserva, Jae Lord Dexter Filipinas, Michael Jade Jerez and Mark Nolan Confesor |
|
Publication date |
2022 |
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Journal |
Physica A: Statistical Mechanics and its Applications |
| Volume |
603 |
| Pages |
127812 |
| Abstract |
Non-equilibrium features in active gels are commonly assessed by the van Hove distribution (VHD) of tracer bead displacement. For instance, pulsed stress is shown to cause side peaks in the VHD such as those induced by Myosin-II motors. Here, we report the same side peaks in the VHD of tracer beads that are periodically displaced by the shuttle streaming of Physarum polycephalum. On the other hand, the mean square displacement (MSD) of tracer trajectory includes oscillatory components, which are not expected for a pulsed stress source. Thus, the VHD and a dynamical measurement is needed to fully characterize tracer dynamics. We present a modified active trap model that fully captures the experimental data for this class of oscillating active gel. |
| Index terms / Keywords |
Active gel; Physarum polycephalum |
| DOI |
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| URL |
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Mindanao State
University - Iligan Institute of Technology