title: Spinning motion of a deformable self-propelled particle in two dimensions.
abstract: We investigate the dynamics of a single deformable self-propelled particle which undergoes a spinning motion in a two-dimensional space. Equations of motion are derived from symmetry arguments for three kinds of variable. One is a vector which represents the velocity of the center of mass. The second is a traceless symmetric tensor representing deformation. The third is an antisymmetric tensor for spinning degree of freedom. By numerical simulations, we have obtained a variety of dynamical states due to interplay between the spinning motion and the deformation. The bifurcations of these dynamical states are analyzed by the simplified equations of motion.
authors.affiliation: Department of Physics, Kyoto University, Kyoto 606-8502, Japan. tarama@ton.scphys.kyoto-u.ac.jp
authors.forename: Mitsusuke
authors.initials: M
authors.lastname: Tarama
authors.forename: Takao
authors.initials: T
authors.lastname: Ohta