2.4k citations · 12k across the 222 of their papers we have counts for
17 papers · 1 filter
Transitioning late-time cosmology with the Hubble parameterization
Vinod Kumar Bhardwaj, Saibal Ray, Kazuharu Bamba +1
We investigate a late-time cosmological model for a homogeneous and isotropic space-time in the Rastall theory. We explore the observational constraints on the Hubble parameter by…
Finslerian wormholes in squared trace gravity
Z. Nekouee, B. R. Yashwanth, Manjunath Malligawad +3
We investigate traversable wormholes in squared-trace extended gravity within the framework of Finsler-Randers geometry equipped with the Barthel connection. The Einstein-Hilbert a…
Physical constraints on the Maldacena-Shenker-Stanford chaos-bound in black hole spacetimes
Terkaa Victor Targema, Kazuharu Bamba, Riasat Ali +1
Chaotic motion near black holes has recently been examined through the lens of the Maldacena-Shenker-Stanford (MSS) chaos-bound, but reported violations remain contradictory. A sig…
Self-consistent Hubble expansion in exponential teleparallel gravity: confrontation with recent observations
K. S. Kavya, T. Vinutha, B. Revathi +1
We reconstruct the Hubble expansion history in exponential teleparallel gravity using recent cosmological observations, including Observational Hubble Data (OHD), the Dark Energy S…
Quintessence-dominated cyclic universe with negative cosmological constant
Nasr Ahmed, Kazuharu Bamba
We investigate two simplified non-singular cyclic models with a negative time-varying cosmological constant to represent the non-conventional mechanism of negative cosmological con…
Gauss-Bonnet entropy and thermal dynamics of RN-AdS black holes
M. Z. Bhatti, Kazuharu Bamba, I. Siddique +2
We explore the thermodynamics of a novel solution for the Reissner-Nordström-Anti-de Sitter (AdS) black hole, uniquely incorporating the Gauss-Bonnet term. Unlike previous studies…
Differential topology and micro-structure of black hole in Einstein-Euler-Heisenberg spacetimes with exponential entropy
Muhammad Yasir, Tong Lining, Kazuharu Bamba
Exact black holes in the Einstein Euler-Heisenberg theory are explored with an exponential entropy framework by using the topological current -mapping theory. The topology class…
An innovative black hole solution and thermodynamic properties in higher-order curvature gravity with a scalar field
G. G. L. Nashed, Usman Zafar, Kazuharu Bamba
A spherically symmetric black hole solution defined by the gravitational mass is explored in higher-order curvature gravity associated with a scalar field. It is demonstrated that…
Thermodynamic and observational implications of black holes in toroidal geometry
Usman Zafar, Kazuharu Bamba, Abdul Jawad +2
We investigate the thermodynamic and observational implications for the charged torus-like black holes, a class of solutions distinct from the classical Schwarzschild black holes.…
Stability of Relativistic Spheres Powered by Energy Profile in Einstein Gauss-Bonnet Gravity
Z. Yousaf, Kazuharu Bamba, Mansoor Alshehri +1
In this paper, we study the dynamical irregularity of the locally anisotropic spherical fluids in the context of Einstein-Gauss-Bonnet theory. We aim to describe the causes of ener…
Maximum mass limit of strange stars in quadratic curvature-matter coupled gravity
Debadri Bhattacharjee, Pradip Kumar Chattopadhyay, Kazuharu Bamba
We explore the maximum mass limit of strange stars in quadratic curvature gravity with the non-minimal matter coupling. The characteristic parameters of the quadratic curvature cou…
Spherically symmetric solution in quadratic non-metricity gravity
G. G. L. Nashed, Kazuharu Bamba
We explicitly find an exact spherically symmetric solution in quadratic non-metricity gravity. We show that the quadratic term acts as a cosmological constant. This solution contra…
Properties of compact objects in quadratic non-metricity gravity
G. G. L. Nashed, Kazuharu Bamba
Astrophysical compact objects are studied in the context of quadratic non-metricity gravity. The solutions to the gravitational field equations, which include fluid components, are…
ACT DR6 Leads to Stronger Evidence for Dynamical Dark Matter
Deng Wang, Kazuharu Bamba
Dark matter is fundamental to the composition, structure, and evolution of the universe. Combining the ACT's cosmic microwave background, DESI's baryon acoustic oscillations with D…
Exploring the Effects of Generalized Entropy onto Bardeen Black Hole Surrounded by Cloud of Strings
Hamza Tariq, Usman Zafar, Shahid Chaudhary +3
This work explores the thermodynamic characteristics and geothermodynamics of a Bardeen black hole (BH) that interacts with a string cloud and is minimally connected to nonlinear e…
Thermodynamic analysis of black holes with cloud of strings and quintessence via Barrow entropy
Usman Zafar, Kazuharu Bamba, Tabinda Rasheed +1
We explore a Reissner-Nordström Anti-de Sitter (RN-AdS) black hole with a cloud of string and quintessence to study thermodynamics and thermodynamic topology in the presence of Bar…
Gravitational Landscapes: black holes with linear equations of state in asymptotically safe gravity
Ramin Hassannejad, Fatimah Shojai, Kazuharu Bamba
We study black holes with linear equation of state within the framework of asymptotically safe gravity. This study extends previous work on gravitational collapse in asymptotically…