Work

Geodesic dynamics in brane–de Sitter wormholes

Year: 2025

Type: article

Abstract: We present a dynamical analysis of the null and timelike geodesics around an asymptotically de Sitter wormhole in a Randall-Sundrum brane. In this framework, the wormhole throat is interpreted both as a photon sphere and as a fixed point of the associated dynamical system. The stability of this structure is evaluated using Lyapunov and Jacobi criteria with consistent results. A Bogdanov-Takens bifurcation is observed in the null-geodesic dynamics, highlighting critical changes in the behavior of light around the wormhole. Explicit solutions are derived for geodesics near the throat, providing insight into the optical appearance of the wormhole shadow. These results show qualitatively similar behavior for null and timelike orbits, suggesting universal features of geodesic dynamics in brane--de Sitter wormholes.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.111.104014

Authors: W. S. Klën, R. C. Barboza, C. Molina

Institutions: Instituto Tecnológico de Aeronáutica, Universidade de São Paulo

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico

Award: Thermodynamics of non stationary black holes and applications