Optimal transport of active particles induced by substrate concentration oscillations

We show the existence of a stochastic resonant regime in the transport of active colloidal particles under confinement. The periodic addition of substrate to the system causes the spectral amplification to exhibit a maximum for an optimal noise level value. The consequence of this is that particles can travel longer distances with lower fuel consumption. The stochastic resonance phenomenon found allows the identification of optimal scenarios for the transport of active particles, enabling them to reach regions that are otherwise difficult to access, and may therefore find applications in transport in cell membranes and tissues for medical treatments and soil remediation.

Automated summary

We have demonstrated the existence of stochastic resonance in the transport of active colloidal particles under confinement. Through the periodic addition of substrate, we found that the spectral amplification reaches its maximum at an optimal noise level, enabling the particles to travel longer distances with lower fuel consumption. This finding has important implications for medical treatments, soil remediation, and transport in cell membranes and tissues.