Elasticity typically refers to a material's ability to store energy, whereas viscosity refers to a
material's tendency to dissipate it. In this review, we discuss fluids and solids for which this is …

In active matter systems, individual constituents convert energy into non-conservative forces
or motion at the microscale, leading to morphological features and transport properties that …

Active matter encompasses systems whose individual constituents dissipate energy to exert
propelling forces on their environment. These systems exhibit dynamical phenomena with …

We derive the long-time dynamics of a tracer immersed in a one-dimensional active bath. In
contrast to previous studies, we find that the damping and noise correlations possess long …

Active systems are driven out of equilibrium by exchanging energy and momentum with their
environment. This endows them with anomalous mechanical properties that are reviewed in …

In active matter, particles typically experience mediated interactions, which are not
constrained by Newton's third law and are therefore generically non-reciprocal. Non …

We perform optical-tweezers experiments and mesoscale fluid simulations to study the
effective interactions between two parallel plates immersed in bacterial suspensions. The …

The discovery of topological edge states that unidirectionally propagate along the boundary
of system without backscattering has enabled the development of new design principles for …

Large-scale collective behavior in suspensions of active particles can be understood from
the balance of statistical forces emerging beyond the direct microscopic particle interactions …

Mixtures of active and passive particles are predicted to exhibit a variety of nonequilibrium
phases. Here we report a dynamic clustering phase in mixtures of colloids and motile …