| Issue |
EPL
Volume 142, Number 6, June 2023
|
|
|---|---|---|
| Article Number | 67004 | |
| Number of page(s) | 7 | |
| Section | Biological and soft matter physics | |
| DOI | https://doi.org/10.1209/0295-5075/acdcb7 | |
| Published online | 22 June 2023 | |
Reentrant condensation transition in a model of driven scalar active matter with diffusivity edge
1 Max Planck Institute for Dynamics and Self-Organization (MPI-DS) - 37077 Gättingen, Germany
2 Institute for Theoretical Physics, KU Leuven - B-3001 Leuven, Belgium
3 Rudolf Peierls Centre for Theoretical Physics, University of Oxford - Oxford OX1 3PU, United Kingdom
(a) E-mail: benoit.mahault@ds.mpg.de (corresponding author)
Received: 6 March 2023
Accepted: 8 June 2023
The effect of a diffusivity edge is studied in a system of scalar active matter confined by a periodic potential and driven by an externally applied force. We find that this system shows qualitatively distinct stationary regimes depending on the amplitude of the driving force with respect to the potential barrier. For small driving, the diffusivity edge induces a transition to a condensed phase analogous to the Bose–Einstein-like condensation reported for the nondriven case, which is characterized by a density-independent steady state current. Conversely, large external forces lead to a qualitatively different phase diagram since in this case condensation is only possible beyond a given density threshold, while the associated transition at higher densities is found to be reentrant.
© 2023 The author(s)
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