Journal of Holography Applications in Physics

Magnetic AdS Black Holes: Topological Thermodynamics and Photon Sphere Analysis

Document Type : Regular article

Authors

1 Department of Physics, Faculty of Basic Sciences, University of Mazandaran P. O. Box 47416-95447, Babolsar, Iran.

2 Center for Theoretical Physics, Khazar University, 41 Mehseti Street, Baku, AZ1096, Azerbaijan; Centre for Research Impact \& Outcome, Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, 140401, Punjab, India

3 Institute of Theoretical Physics, National University of Uzbekistan, University Str. 4, Tashkent 100174, Uzbekistan; University of Tashkent for Applied Sciences, Str. Gavhar 1, Tashkent, 100149, Uzbekistan; Tashkent State Technical University, University Str. 1, Tashkent 100095, Uzbekistan; Urgench State University, Kh. Alimjan Str. 14, Urgench 221100, Uzbekistan

Abstract

We study the thermodynamic topology of magnetic AdS black holes, with a focus on topological charges and their configurations. Zero points in the system’s vector field correspond to topological charges, whose numbers change with key parameters. Across all free parameter ranges, the total topological charge consistently matches that of AdS Reissner-Nordström black holes. Also, we analyze photon spheres, revealing their role in black hole structures and resilience to parameter variations. Unstable photon spheres show distinctive signatures, showing black holes' spacetime geometry. This topological framework offers a systematic approach to understanding black hole stability, phase transitions, and potential astrophysical phenomena.

Keywords

Main Subjects

 

Article PDF

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Journal of Holography Applications in Physics
Volume 6, Issue 2
January 2026
Pages 56-69
  • Receive Date: 27 October 2025
  • Revise Date: 11 December 2025
  • Accept Date: 11 December 2025