9 papers
Phase Transitions with Lyapunov Exponents under Einstein and String Frames in Dilatonic Reissner--Nordström--AdS Black Holes
Hocheol Lee, Bogeun Gwak
We investigate Lyapunov exponents as dynamical probes of black hole phase transitions in dilatonic Reissner--Nordström--AdS black holes within Einstein--Maxwell--dilaton theory. T…
Chaotic behaviors of particles around the black hole with an anisotropic matter immersed in a magnetic field
Khusan Alibekov, Hocheol Lee, Yovqochev Pahlavon +4
We present an exact solution to the Einstein-Maxwell equations that describes a static black hole coexisting with anisotropic matter immersed in an external magnetic field, obtaine…
Phase transition for a black hole with matter fields and the relation with the Lyapunov exponent
Pakhlavon Yovkochev, Bobomurat J. Ahmedov, Bum-Hoon Lee +2
We construct black hole geometries coexisting with anisotropic matter in (anti)-de Sitter spacetime. We specifically focus on the black hole phase transitions that occur in anti-de…
Gauss-Bonnet corrected string/black hole transition in large dimensions
Bum-Hoon Lee, Hocheol Lee, Somyadip Thakur
We develop a unified analytic treatment of the Horowitz--Polchinski string/black hole correspondence that systematically incorporates higher-derivative corrections to gravity. Work…
Unbounded Radius of Innermost Stable Circular Orbit in Higher-Dimensional Black Holes
Hocheol Lee, Bogeun Gwak
The innermost stable circular orbit (ISCO) offers a fundamental test of spacetime structure. However, its behavior in higher-dimensional black holes influenced by anisotropic energ…
Frame Dependence of Bound on Lyapunov Exponent in Dilatonic Reissner-Nordström-AdS and Kerr-Sen-AdS Black Holes
Hocheol Lee, Bogeun Gwak
We investigate the frame dependence of the Lyapunov exponent bound for charged particles in dilatonic Reissner-Nordström-AdS and Kerr-Sen-AdS black hole backgrounds, derived from…