Bacteria are among the oldest and most abundant species on Earth. Bacteria successfully
colonize diverse habitats and play a significant role in the oxygen, carbon, and nitrogen …

Active matter agents consume internal energy or extract energy from the environment for
locomotion and force generation. Already, rather generic models, such as ensembles of …

Spontaneous growth of long-wavelength deformations is a defining feature of active liquid
crystals. We investigate the effect of confinement on the instability of 3D active liquid crystals …

Chiral active particles (CAPs) are self-propelling particles that break time-reversal symmetry
by orbiting or spinning, leading to intriguing behaviors. Here, we examined the dynamics of …

We review recent theoretical and experimental developments in measuring the rheological
response of active colloidal systems. Particular attention is dedicated to active and passive …

We experimentally study the emergence of collective bacterial swimming, a phenomenon
often referred to as bacterial turbulence. A phase diagram of the flow of 3D Escherichia coli …

We study the effect of spatial anisotropy on polar flocks by investigating active q-state clock
models in two dimensions. In contrast to the equilibrium case, we find that any amount of …

Motile bacteria are known to accumulate at surfaces, eventually leading to changes in
bacterial motility and biofilm formation. We use a novel two-color, three-dimensional …

We characterize the full spatiotemporal gait of populations of swimming Escherichia coli
using renewal processes to analyze the measurements of intermediate scattering functions …

While bacterial swarms can exhibit active turbulence in vacant spaces, they naturally inhabit
crowded environments. We numerically show that driving disorderly active fluids through …