Enhanced diffusion of a tracer particle in a lattice model of a crowded active system

Living systems at the subcellular, cellular, and multicellular levels are often crowded that contain active particles. The motion of these particles can also propel passive particles, which typically results in enhanced effective diffusion Here we study a tracer particle such dense system crowders using minimal lattice model incorporating pushing each other. We show exhibits several regimes motility quantify as function density activity crowders. Moreover, demonstrate an interplay clustering suppresses diffusion. Simulations mixtures rather small fraction is sufficient for observation