Bifurcations in one degree-of-vibration quantum billiards

Details Bifurcations in one degree-of-vibration quantum billiards Bifurcations in one degree-of-vibration quantum billiards

2001-07-23

arxiv.org/abs/nlin/0107053v1

International Journal of Bifurcation (Vol 11, No 4, p. 903-911 [4/01])

Nonlinear Sciences

Chaotic Dynamics

26 pages, 8 figures

Scientific paper

We classify the local bifurcations of one dov quantum billiards, showing that only saddle-center bifurcations can occur. We analyze the resulting planar system when there is no coupling in the superposition state. In so doing, we also consider the global bifurcation structure. Using a double-well potential as a representative example, we demonstrate how to locate bifurcations in parameter space. We also discuss how to approximate the cuspidal loop using AUTO as well as how to cross it via continuation by detuning the dynamical system. Moreover, we show that when there is coupling, the resulting five-dimensional system--though chaotic--has a similar underlying structure. We verify numerically that both homoclinic orbits and cusps occur and provide an outline of an analytical argument for the existence of such homoclinic orbits. Small perturbations of the system reveal homoclinic tangles that typify chaotic behavior.

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