  To understand the dynamical and conformational properties of deformable
active agents in porous media, we computationally investigate the dynamics of
linear chains and rings made of active Brownian monomers. In porous media,
flexible linear chains and rings always migrate smoothly and undergo
activity-induced swelling. However, semiflexible linear chains though navigate
smoothly, shrink at lower activities, followed by swelling at higher
activities, while semiflexible rings exhibit a contrasting behavior.
Semiflexible rings shrink, get trapped at lower activities, and escape at
higher activities. This demonstrates how activity and topology interplay and
control the structure and dynamics of linear chains and rings in porous media.
We envision that our study will shed light on understanding the mode of
transport of shape-changing active agents in porous media.
