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 …

Out of equilibrium, a lack of reciprocity is the rule rather than the exception. Non-reciprocity
occurs, for instance, in active matter,,,,–, non-equilibrium systems,–, networks of neurons …

Pair interactions between active particles need not follow Newton's third law. In this work, we
propose a continuum model of pattern formation due to nonreciprocal interaction between …

We examine a nonreciprocally coupled dynamical model of a mixture of two diffusing
species. We demonstrate that nonreciprocity, which is encoded in the model via antagonistic …

We study the thermodynamic properties induced by non-reciprocal interactions between
stochastic degrees of freedom in time-and space-continuous systems. We show that, under …

The name active matter refers to any collection of entities that individually use free energy to
generate their own motion and forces. Through interactions, active particles spontaneously …

The past two decades have seen a remarkable progress in the development of synthetic
colloidal agents which are capable of creating directed motion in an unbiased environment …

Recently, non-reciprocal systems have become a focus of growing interest. Examples occur
in soft and active matter, but also in engineered quantum materials and neural (brain) …

A hallmark of living systems is the ability to employ a common set of building blocks that can
self-organize into a multitude of different structures. This capability can only be afforded in …