Scaling and self-similarity for the dynamics of a particle confined to an asymmetric time-dependent potential well

Autor(es)

da Costa, Diogo R. ; Mendez-Bermudez, J. A. ; Leonel, Edson D.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW E; v. 99, n. 1, p. 8-pg., 2019-01-02.

Resumo

The dynamics of a classical point particle confined to an asymmetric time-dependent potential well is investigated under the framework of scaling. The potential corresponds to a reduced version of a particle moving along an infinitely periodic sequence of synchronously oscillating potential barriers. The dynamics of the model is described by a two-dimensional nonlinear and area preserving map in energy and phase variables. The asymmetric potential well is defined by two regions: Region I with fixed null potential and region II with an oscillating potential. The time-dependent potential of region II makes, for certain initial conditions, the particle to undergo a number of multiple reflections eta at the border of the two regions and stay trapped in region I. Such trappings are described by histograms of multiple reflections eta, obeying the power-law H(eta) proportional to eta(-nu) with nu approximate to 3, which are scale invariant with a scaling parameter depending of the control parameters of the mapping. We identify the location of the sets of initial conditions in phase space producing the multiple reflections and show that they generate well defined self-similar structures in density plots of trajectories in energy space. The self-similar structures can be enhanced by properly tuning the system parameters. (AU)

• Processo FAPESP: 17/14414-2 - Investigação de escala em sistemas dinâmicos
• Beneficiário: Edson Denis Leonel
• Modalidade de apoio: Auxílio à Pesquisa - Regular