4 papers
Dynamical Completion of Coupling-Charge Thermodynamics
Kamal Hajian, Bayram Tekin
The scalar-gauge pair formulation promotes gravitational coupling constants to conserved charges, clarifying their role in extended black hole thermodynamics. However, its original…
An Exact Single-Rotating Near-Horizon Geometry in Einstein-Gauss-Bonnet Gravity
U. Can Çelik, Kamal Hajian, Jutta Kunz
We construct a five-dimensional singly rotating near-horizon solution in Einstein-Gauss-Bonnet gravity. We show that the Gauss-Bonnet term removes the local curvature singularity,…
A Universal Smarr Formula via Coupling Constants
Kamal Hajian, Bayram Tekin, Onur Ucanok
In gravitational theories containing matter fields and higher-derivative corrections, the standard Smarr formula often fails unless all dimensionful couplings are incorporated cons…
Hodge Dual Gauge Symmetry in Minimal Einstein-Aether Theory
Kamal Hajian
Einstein-aether gravity is a theory that breaks the local Lorentz symmetry by introducing a preferred direction via a vector field, which is considered to play the role of an aethe…