Classical chaotic scattering is a topic of fundamental interest in nonlinear physics due to the
numerous existing applications in fields such as celestial mechanics, atomic and nuclear …

In a recent paper [PVP Cunha, CAR Herdeiro, E. Radu, and HF Runarsson, Phys. Rev. Lett.
115, 211102 (2015).], it was shown that the lensing of light around rotating boson stars and …

A bstract We investigate the conjectured bound on the Lyapunov exponent for a charged
particle with angular motion in the Kerr-Newman-AdS black hole. The Lyapunov exponent is …

We study the motion of a spinning test particle in Schwarzschild spacetime, analyzing the
Poincaré map and the Lyapunov exponent. We find chaotic behavior for a particle with spin …

Understanding the dynamics around rotating black holes is imperative to the success of
future gravitational wave observatories. Although integrable in principle, test-particle orbits …

We investigate the conjecture on the upper bound of the Lyapunov exponent for the chaotic
motion of a charged particle around a Kerr-Newman black hole. The Lyapunov exponent is …

We investigate the qualitative features of binary black hole shadows using the model of two
extremally charged black holes in static equilibrium (a Majumdar–Papapetrou solution). Our …

For the past decade there has been a considerable debate about the existence of chaos in
the mixmaster cosmological model. The debate has been hampered by the coordinate, or …

When gravitational fields are at their strongest, the evolution of spacetime is thought to be
highly erratic. Over the past decade debate has raged over whether this evolution can be …

We study the homoclinic orbit and the violation of chaos bound, which are obtained by
particle motions around a black hole that coexist with anisotropic matter fields. The …