Birth, Death, and Flight: A Theory of Malthusian Flocks
Birth, Death, and Flight: A Theory of Malthusian Flocks
I study "Malthusian Flocks": moving aggregates of self-propelled entities (e.g., organisms, cytoskeletal actin, microtubules in mitotic spindles) that reproduce and die. Long-ranged order (i.e., the existence of a non-zero average velocity $<\vec v (\vec r, t) >\ne \vec 0$) is possible in these systems, even in spatial dimension $d=2$. Their …