Active fluids exhibit spontaneous flows with complex spatiotemporal structure, which have
been observed in bacterial suspensions, sperm cells, cytoskeletal suspensions, self …

Bacterial swarms display intriguing dynamical states like active turbulence. Now, using a
hydrodynamic model, we show that such dense active suspensions manifest superdiffusion …

The phenomenon of active turbulence, a complex organization of matter driven at the scale
of its constituent agents, is puzzling. Specifically, the lack of scale-separation in low …

Recent experiments have shown that the complex spatio-temporal vortex structures
emerging in active fluids are susceptible to weak geometrical constraints. This observation …

Meso-scale turbulence was originally observed experimentally in various suspensions of
swimming bacteria, as well as in the collective motion of active colloids. The corresponding …

Active matter systems display a fascinating range of dynamical states, including stationary
patterns and turbulent phases. While the former can be tackled with methods from the field of …

We report the numerical evidence of a new state of bacterial turbulence in confined
domains. By means of extensive numerical simulations of the Toner-Tu-Swift-Hohenberg …

We use the mean-bacterial-velocity model to investigate the irreversibility of two-
dimensional (2D) bacterial turbulence and to compare it with its 2D fluid-turbulence …

Melting of two-dimensional (2D) equilibrium crystals is a complex phenomenon
characterized by the sequential loss of positional and orientational order. In contrast to …

We present a hydrodynamic theory of incompressible polar active fluids with quenched
random field disorder. This theory shows that such fluids can overcome the disruption …