3 papers
gr-qc2026
Geometrically Significant Surfaces of Black Holes from a Single Scalar
Cagdas Ulus Agca, Bayram Tekin
Black hole spacetimes contain several geometrically distinguished hypersurfaces, including event and Cauchy horizons, stationary-limit surfaces, curvature singularities, and asympt…
gr-qc2025
Fluid-membrane Descriptions of Various Black Holes
Cagdas Ulus Agca, Bayram Tekin
The membrane paradigm of black holes is an effective theory that replaces the event horizon with a fictitious yet tangible fluid. It has provided us with valuable insights, especia…
hep-th2025
A holographic description on half planes and wedges for N = 1 SUSY BF theory in 2D
Cagdas Ulus Agca
BF theory is a topological field theory that appears in different parts of theoretical physics and one of its important uses is in lower dimensional holography settings. While it c…