Physics – Condensed Matter
Scientific paper
1997-08-06
Physics
Condensed Matter
RevTeX, 4 eps figures included
Scientific paper
We consider a permanent magnetic dipole in an oscillating magnetic field. This magnetic oscillator has two dynamical symmetries. With increasing the amplitude $A$ of the magnetic field, dynamical behaviors associated with the symmetries are investigated. For small $A$, there exist symmetric states with respect to one of the two symmetries. However, such symmetric states lose their symmetries via symmetry-breaking pitchfork bifurcations and then the symmetry-broken states exhibit period-doubling transitions to chaos. Consequently, small chaotic attractors with broken symmetries appear. However, as $A$ is further increased they merge into a large symmetric chaotic attractor via symmetry-restoring attractor-merging crisis.
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