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Photon orbits and phase transition for Non-Linear charged Anti-de Sitter black holes

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arxiv 2204.01007 v2 pith:XJIZRWL5 submitted 2022-04-03 hep-th

Photon orbits and phase transition for Non-Linear charged Anti-de Sitter black holes

classification hep-th
keywords parameterphotonblackcriticalimpactphaseradiussphere
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

In this work, we investigate the relationship between the photon sphere radius and the first-order phase transition for the charged EPYM AdS black hole. Through the analysis, we find with a certain condition there exist the non-monotonic behaviors between the photon sphere radius, the impact parameter, the non-linear YM charge parameter, temperature, and pressure. And both the changes of photon sphere radius and impact parameter before and after phase transition can be regarded as the order parameter, their critical exponents near the critical point are equal to the same value $1/2$, just like the ordinary thermal systems. These indicate that there maybe exists a universal relationship of gravity nearby the critical point for a black hole thermodynamical system. Furthermore, the effect of impact parameter on the deflect angle is also investigated.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Unifying topological, geometric, and complex classifications of black hole thermodynamics

    gr-qc 2026-04 unverdicted novelty 7.0

    Three classification schemes for black hole thermodynamics are equivalent, with the count of temperature extrema determining the class in each framework.

  2. Off-shell Hessian thermodynamic stability of higher-curvature black holes

    gr-qc 2026-06 unverdicted novelty 6.0

    An off-shell Hessian criterion H = S'_W(r_h) T'(r_h) governs thermodynamic stability of higher-curvature black holes, recovering the temperature-slope rule on physical branches and producing mean-field critical exponents.

  3. Unifying topological, geometric, and complex classifications of black hole thermodynamics

    gr-qc 2026-04 conditional novelty 6.0

    Black hole thermodynamic classifications based on temperature-curve extrema, topological winding numbers, and complex Riemann-surface foliations are equivalent; all reduce to counting the extrema of the temperature function.

  4. Photon Spheres and shadow of modified black-hole entropies

    gr-qc 2026-05 unverdicted novelty 4.0

    Modified black hole entropies alter photon sphere radii and shadow sizes, with parameters constrained by Event Horizon Telescope observations of Sgr A*.

  5. Photon Spheres and shadow of modified black-hole entropies

    gr-qc 2026-05 unverdicted novelty 4.0

    Corrected black hole entropies produce distinct shifts in photon sphere radius and shadow size that are constrained by Event Horizon Telescope data on Sagittarius A*.

  6. Photon Spheres and shadow of modified black-hole entropies

    gr-qc 2026-05 unverdicted novelty 4.0

    Entropy corrections to black holes produce modified metrics whose photon-sphere and shadow sizes can be constrained by Sgr A* observations.

  7. Gaussian curvature and Lyapunov exponent as probes of black hole phase transitions

    gr-qc 2025-09 conditional novelty 4.0

    Gaussian curvature at the light ring inherits the swallowtail multivaluedness of free energy in first-order black hole phase transitions, following directly from K = -λ².