title: Mode bifurcation of a bouncing dumbbell with chirality.
abstract: We studied the behavior of a dumbbell bouncing upon a sinusoidally vibrating plate. By introducing chiral asymmetry to the geometry of the dumbbell, we observed a cascade of bifurcations with an increase in the vibration amplitude: spinning, orbital, and rolling. In contrast, for an achiral dumbbell, bifurcation is generated by a change from random motion to vectorial inchworm motion. A simple model particle was considered in a numerical simulation that reproduced the essential aspects of the experimental observation. The mode bifurcation from directional motion to random motion is interpreted analytically by a simple mechanical discussion.
authors.affiliation: Department of Physics, Kyoto University, Kyoto, 606-8502, Japan.
authors.forename: Yoshitsugu
authors.initials: Y
authors.lastname: Kubo
authors.affiliation: Department of Physics, Chiba University, Chiba, 263-8522, Japan.
authors.forename: Shio
authors.initials: S
authors.lastname: Inagaki
authors.affiliation: Department of Physics, Kyoto University, Kyoto, 606-8502, Japan.
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Ichikawa
authors.affiliation: Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, 610-0394, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Yoshikawa
mesh_terms: D008962:Models, Theoretical; D009038:Motion; D014732:Vibration