Thermodynamically consistent pulsating active matter

In active matter, sustained energy dissipation at the microscopic scale results in self-organized dynamical phases with unusual macroscopic behaviors that are forbidden in passive matter. Correctly accounting for dissipation in such active systems is challenging. This can be achieved by constructing thermodynamically consistent (TC) models which properly couple the system to equilibrium reservoirs. In this talk, we introduce a TC lattice model of pulsating active particles which organize into propagating patterns stirred by topological defects. We show that this particle-based model is amenable to an exact coarse-graining which preserves its thermodynamic structure, and therefore leads to a TC hydrodynamic model. We characterize the emergent phases in terms of their global and local dissipation, in view of examining the relation between the dynamics of topological defects and the dissipation.