Coarsening of topological defects in 2D polar active matter*

In this talk, I'll describe how topological defects in 2D polar active materials coarsen and form dynamic patterns. I'll outline the key differences of the active coarsening process from the equilibrium coarsening. Next, I'll discuss the novel scaling that emerges due to the nonlinear interactions between the defects. I'll close the talk by showing several application of our results to biological systems.