Regular Article - Flowing Matter
Optimal escapes in active matter
Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Piazzale A. Moro 2, I-00185, Roma, Italy
2 Dipartimento di Fisica, Sapienza Università di Roma, Piazzale A. Moro 2, I-00185, Roma, Italy
Accepted: 20 December 2023
Published online: 28 January 2024
The out-of-equilibrium character of active particles, responsible for accumulation at boundaries in confining domains, determines not-trivial effects when considering escape processes. Non-monotonous behavior of exit times with respect to tumbling rate (inverse of mean persistent time) appears, as a consequence of the competing processes of exploring the bulk and accumulate at boundaries. By using both 1D analytical results and 2D numerical simulations of run-and-tumble particles with different behaviours at boundaries, we scrutinize this very general phenomenon of active matter, evidencing the role of accumulation at walls for the existence of optimal tumbling rates for fast escapes.
© The Author(s) 2024
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