Chaos Bound and Circular Motion Around Bardeen Black Holes

In this paper, we study the influence of particle’s charge and angular momentum around charged Bardeen black holes on the Lyapunov exponent, and find the spatial regions where the chaos bound is violated for certain values of the black holes’ parameters. The exponent is obtained by calculating the e...

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Bibliographic Details
Published inInternational journal of theoretical physics Vol. 62; no. 8
Main Authors Wang, Zeqiang, He, Yucheng, Lei, Changxiang, Chen, Deyou
Format Journal Article
LanguageEnglish
Published New York Springer US 19.08.2023
Subjects
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
Chaos bound
Spatial regions
Bardeen black hole
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Summary:In this paper, we study the influence of particle’s charge and angular momentum around charged Bardeen black holes on the Lyapunov exponent, and find the spatial regions where the chaos bound is violated for certain values of the black holes’ parameters. The exponent is obtained by calculating the eigenvalues of the Jacobian matrix in the phase space. The result shows the bound is violated in the near-horizon regions and at a certain distance from the horizons. When the charge or angular momentum of a particle is fixed at at certain values, the spatial regions decreases with the increase of the black hole charge, while when the black holes’ charge is fixed, it decreases with the increase of the particle’s charge or angular momentum.
ISSN:1572-9575
1572-9575
DOI:10.1007/s10773-023-05432-7