@article {Differential_activity,
	title = {Differential-activity driven instabilities in biphasic active matter},
	year = {Submitted},
	abstract = {Active stresses can cause instabilities in contractile gels and living tissues. Here we describe a generic hydrodynamic theory that treats these systems as a mixture of two phases of varying activity and different mechanical properties. We find that differential activity between the phases provides a mechanism causing a demixing instability. that can lead to phase separation. We follow the nonlinear evolution of the instability and characterize a phase diagram of the resulting patterns. Our study on how differential activity drives patterning complements other instability mechanisms in mixtures such as differential growth, shape, motion or adhesion.},
	url = {http://arxiv.org/abs/1710.03633.pdf},
	author = {Christoph A. Weber, Chris H. Rycroft and L.\ Mahadevan}
}
