4 papers
Extended Thermodynamics and Renyi Entropy Beyond Fixed Central Charge
Chatchai Promsiri, Phuwadon Chunaksorn, Ratchaphat Nakarachinda +1
An outstanding problem in the framework of conformal thermodynamics concerns the interpretation of variations in the central charge . In this paper, we construct a novel central…
Integral Transformations for Conformally Invariant Celestial Amplitudes
Aphiwat Yuenyong, Pongwit Srisangyingcharoen, Ekapong Hirunsirisawat +1
We propose an integral transformation for celestial gluon amplitudes that maps the celestial coordinates \((z_i,\bar z_i)\) to a new set of complex variables \((s_i,\bar s_i)\), in…
Remarks on the light ring images and the optical appearance of hairy black holes in Einstein-Maxwell-dilaton gravity
Chatchai Promsiri, Weerawit Horinouchi, Ekapong Hirunsirisawat
The behaviors of null geodesics in the spherical symmetric black holes in Einstein-Maxwell-dilaton (EMD) theory with coupling function are meticulously analyzed.…
Observing Black Hole Phase Transitions in Extended Phase Space and Holographic Thermodynamics Approaches from Optical Features
Chatchai Promsiri, Weerawit Horinouchi, Ekapong Hirunsirisawat
The phase transitions of charged Anti-de Sitter (AdS) black holes are characterized by studying null geodesics in the vicinity of the critical curve of photon trajectories around b…