Chaos and fast scrambling delays of a dyonic Kerr-Sen-AdS4 black hole and its ultraspinning version

Apr 18, 2023
19 pages
Published in:
  • Phys.Rev.D 107 (2023) 12, 124053
  • Published: Jun 15, 2023
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Abstract: (APS)
The scrambling time and its delay are calculated using holography in an asymptotically AdS black hole solution of the gauged Einstein-Maxwell dilaton-axion (EMDA) theory, the dyonic Kerr-Sen-AdS4 black hole, perturbed by rotating and charged shock waves along the equator. The leading term of the scrambling time for a black hole with large entropy is logarithmic in the entropy and hence supports the fast scrambling conjecture for this black hole solution, which implies that the system under consideration is chaotic. We also find that the instantaneous minimal Lyapunov index is bounded by κ=2πTH/(1-μL), which is analogous to the surface gravity but for the rotating shock waves, and becomes closer to equality for the near extremal black hole. For a small value of the AdS scale, we found that the Lyapunov exponent can exceed the bound for a large value of L. Due to the presence of the electric and magnetic charge of the shock waves, we also show that the scrambling process of this holographic system is delayed by a time scale that depends on the charges of the shock waves. The calculations also hold for the ultraspinning version of this black hole. The result of this paper generalizes the holographic calculations of chaotic systems which are described by an EMDA theory in the bulk.
Note:
  • 19 pages
  • gravitation: surface
  • charge: magnetic
  • black hole: anti-de Sitter
  • shock waves
  • holography
  • chaos
  • entropy
  • rotation
  • dyon
  • Lyapunov exponent