10 citations · 27 across the 9 of their papers we have counts for
10 papers
Complex Phase Structure of Kerr-AdS Black Holes: Critical Saddles and Fisher Zeros
Bum-Hoon Lee, Hocheol Lee, Somyadip Thakur
We study the complex saddle structure of singly rotating Kerr--AdS black holes using a two-variable reduced model in the grand canonical ensemble at fixed angular velocity, …
Chaotic behaviors of particles around the black hole with an anisotropic matter immersed in a magnetic field
Khusan Alibekov, Hocheol Lee, Yovqochev Pahlavon +6
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…
Resonant transmission of scalar waves through rotating traversable wormhole
Rajesh Karmakar, Bum-Hoon Lee, Wonwoo Lee
The viability of traversable wormholes as exotic compact objects requires the identification of signatures that distinguish them from other compact objects. Given recent advances i…
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 static black hole solutions coexisting with anisotropic matter in asymptotically (anti-)de Sitter spacetime and investigate how the matter field modifies their thermod…
Constraints on Cosmic Birefringence from SPIDER, Planck, and ACT observations
Lu Yin, Shuhang Xiong, Joby Kochappan +2
The Early Dark Energy (EDE) model has been proposed as a candidate mechanism to generate cosmic birefringence through a Chern-Simons coupling between a dynamical scalar field and t…
Observational evidence for Early Dark Energy as a unified explanation for Cosmic Birefringence and the Hubble tension
Joby Kochappan, Lu Yin, Bum-Hoon Lee +1
We test the =3 Ultralight Axion-like model of Early Dark Energy (EDE) with the observationsof the mode of the cosmic microwave background (CMB) radiation, and local expansi…
Stability and topological nature of charged Gauss-Bonnet AdS black holes in five dimensions
Imtak Jeon, Bum-Hoon Lee, Wonwoo Lee +1
We investigate the thermodynamics of Reissner-Nordstrom Gauss-Bonnet (RN-GB) black holes in anti-de Sitter (AdS) space with three horizon geometries (k=+1,0,-1) within the grand ca…
Gauss-Bonnet Cosmology: large-temperature behaviour and bounds from Gravitational Waves
Anirban Biswas, Arpan Kar, Bum-Hoon Lee +5
We provide a transparent discussion of the high temperature asymptotic behaviour of Cosmology in a dilaton-Einstein-Gauss-Bonnet (dEGB) scenario of modified gravity with vanishing…
Charged traversable wormholes: charge without charge
Hyeong-Chan Kim, Sung-Won Kim, Bum-Hoon Lee +1
We present and investigate charged wormhole solutions of the Einstein-Maxwell equations supported by anisotropic matter fields, with the purpose of establishing their physical plau…
Induced Cosmological Anisotropies and CMB Anomalies by a non-Abelian Gauge-Gravity Interaction
Bum-Hoon Lee, Hocheol Lee, Wonwoo Lee +2
We present a non-abelian cousin of the model presented in \cite{Lee:2022rtz} which induces cosmological anisotropies on top of standard FLRW geometry. This is in some sense doing a…