Diffusion transitions in a 2D periodic lattice

Lazarotto, Matheus J.; Caldas, Iberê L.; Elskens, Yves

doi:10.1016/j.cnsns.2022.106525

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Poincaré Cross-sections and Lyapunov Exponents1

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2024

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Cited by 4 publications

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“…Since Poincaré it is known that periodic solutions of the considered system form the skeleton of the structure of the phase space. Of course, there are many approaches for finding and studying periodic solutions; for instance, see the newest one [101]. Here, we propose to locate stable periodic solutions in the global cross-section and use them as a kind of filter.…”

Section: Poincaré Cross-sections and Lyapunov Exponentsmentioning

confidence: 99%

Dynamics and non-integrability of the double spring pendulum

Szumiński,

Maciejewski

2024

Journal of Sound and Vibration

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Section: Poincaré Cross-sections and Lyapunov Exponentsmentioning

confidence: 99%

Dynamics and non-integrability of the double spring pendulum

Szumiński,

Maciejewski

2024

Journal of Sound and Vibration

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Island myriads in periodic potentials

Lazarotto,

Caldas,

Elskens

2024

Chaos: An Interdisciplinary Journal of Nonlinear Science

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A phenomenon of emergence of stability islands in phase space is reported for two periodic potentials with tiling symmetries, one square and the other hexagonal, inspired by bidimensional Hamiltonian models of optical lattices. The structures found, here termed as island myriads, resemble web-tori with notable fractality and arise at energy levels reaching that of unstable equilibria. In general, the myriad is an arrangement of concentric island chains with properties relying on the translational and rotational symmetries of the potential functions. In the square system, orbits within the myriad come in isochronous pairs and can have different periodic closure, either returning to their initial position or jumping to identical sites in neighbor cells of the lattice, therefore impacting transport properties. As seen when compared to a more generic case, i.e., the rectangular lattice, the breaking of square symmetry disrupts the myriad even for small deviations from its equilateral configuration. For the hexagonal case, the myriad was found but in attenuated form, mostly due to extra instabilities in the potential surface that prevent the stabilization of orbits forming the chains.

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