A model with Darwinian dynamics on a rugged landscape
  We discuss the population dynamics with selection and random diffusion, keeping the total population constant, in a fitness landscape associated with Constraint Satisfaction, a paradigm for difficult optimization problems. We obtain a phase diagram in terms of the size of the population and the diffusion rate, with a glass phase inside which the dynamics keeps searching for better configurations, and outside which deleterious `mutations' spoil the performance. The phase diagram is analogous to that of dense active matter in terms of temperature and drive. 
Tommaso Brotto, Guy Bunin and Jorge Kurchan
q-bio.PE cond-mat.stat-mech physics.bio-ph