Transport of biological objects subject to active Brownian motion

C.A. CONDAT; G.J. SIBONA

Huerta Grande, Cordoba

Workshop; LAWNP'99; 1999

Comite organizador ad hoc

Recently, Schweitzer, Ebeling and Tilch (SET) introduced a model for the motion of Brownian objects with internal energy depots (Phys. Rev. Lett. 80, 5044 (1988)). SET used a Langevin formulation to analyze the effects of adding the extra acceleration term related to the depot presence.  We have developed a Fokker-Planck formalism to describe the depot action, obtaining the corresponding steady-state solutions, and used simulations to obtain the time-dependent solutions. We discuss the properties of the mean-square speed and of the displacement moments, examining the possibilities arising from various energy take-up channels, especially the cases when the energy uptake is constant (as in SET) and when it is proportional to object speed (the “shark” model).