Over the past 15 years, the field of microrobotics has exploded with many research groups
from around the globe contributing to numerous innovations that have led to exciting new …

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

Active materials are characterized by continuous injection of energy at the microscopic level
and typically cannot be adequately described by equilibrium thermodynamics. Here we …

Fluids in which both time reversal and parity are broken can display a dissipationless
viscosity that is odd under each of these symmetries. Here, we show how this odd viscosity …

The collective mobility of active matter (self-propelled objects that transduce energy into
mechanical work to drive their motion, most commonly through fluids) constitutes a new …

We review the general aspects of the concept of temperature in equilibrium and non-
equilibrium statistical mechanics. Although temperature is an old and well-established …

Active fluids comprised of autonomous spinning units injecting energy and angular
momentum at the microscopic level represent a promising platform for active materials …

Active matter comprises individually driven units that convert locally stored energy into
mechanical motion. Interactions between driven units lead to a variety of nonequilibrium …

Broken time-reversal and parity symmetries in active spinner fluids imply a nondissipative
“odd viscosity,” engendering phenomena unattainable in traditional passive or active fluids …

Nonequilibrium phase transitions are routinely observed in both natural and synthetic
systems. The ubiquity of these transitions highlights the conspicuous absence of a general …