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J Phys Condens Matter. 2012 Nov 21;24(46):464129. doi: 10.1088/0953-8984/24/46/464129. Epub 2012 Oct 31.

Spinning motion of a deformable self-propelled particle in two dimensions.

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  • 1Department of Physics, Kyoto University, Kyoto 606-8502, Japan.


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.

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