24 papers
Testing a Sign-Switch Cosmological Model with Curvature through Latest Planck 2018, DESI DR2 and PantheonPlus\&SH0ES Observational Data
Archana Dixit, Manish Yadav, Anirudh Pradhan +1
We investigate the spatial geometry of the Universe within the framework of a sign-switch dark energy scenario by extending the recently proposed CDM model to include a…
Kinematic Bounds on Charged Energy Extraction in the Purely Electric Branch of Euler--Heisenberg Type f(R,T) Black Holes
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin
We derive and test kinematic upper bounds on charged energy extraction in the purely electric branch of a static black hole family sourced by an Euler--Heisenberg type non…
Charged Penrose Extraction in RN--AdS Black Holes with Dark Energy: Ergosphere Geometry and Rigorous Efficiency Bounds
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin
We develop a quantitative framework for charge assisted Penrose extraction in Reissner--Nordström Anti-de Sitter black holes surrounded by a Kiselev type anisotropic dark energy se…
Coupled Gravitoelectromagnetic Response of a Magnetically Supported Generalized Hayward Black Hole in Nonlinear Electrodynamics
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin +1
We construct the exterior coupled gravitational and electromagnetic response of a magnetically supported generalized Hayward black hole within a specified nonlinear electrodynamic…
Finite mass two throat wormholes: global light rings, branch resolved strong lensing, and scalar transmission
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin +1
We introduce a static, horizonless, asymptotically flat two throat wormhole family in which one global metric determines the geometry, effective source, null dynamics, lensing, and…
Testing Exponential Gravity with CMB, DESI-DR2, and Supernova Data
Saurabh Verma, Archana Dixit, Anirudh Pradhan +1
One of the most popular competitors to the CDM paradigm as an explanation for the late-time acceleration of the universe is the modification of general relativity (GR), with models…