Chaos bound and its violation in charged Kiselev black hole

TL;DR

This paper explores the behavior of chaos bounds near charged Kiselev black holes, revealing violations at certain distances influenced by particle angular momentum and normalization factors.

Contribution

It investigates the chaos bound in charged Kiselev black holes, highlighting conditions under which the bound is violated away from the horizon.

Findings

Chaos bound is violated at certain distances from the horizon.

Angular momentum affects the equilibrium orbit position.

Violation likelihood increases with smaller normalization factors.

Abstract

The chaos bound in the near-horizon regions has been studied through the expansions of the metric functions on the horizon. In this paper, we investigate the chaos bound in the the near-horizon region and at a certain distance from the horizon of a charged Kiselev black hole. The value of the Lyapunov exponent is accurately calculated by a Jacobian matrix. The angular momentum of a charged particle around the black hole affects not only the exponent, but also the position of the equilibrium orbit. This position gradually moves away from the horizon with the increase of the angular momentum. We find that the the bound is violated at a certain distance from the horizon and there is no violation in the near-horizon region when the charge mass ratio of the particle is fixed. The small value of the normalization factor is more likely to cause the violation.