Singularity Resolution in Quantum Cosmology via Page-Wootters FormalismWe investigate the problem of classical big bang singularity in a plane-symmetric Bianchi type-I universe within the Wheeler-DeWitt (WDW) framework of quantum gravity. To address the problem of time,…Vishal, Malay K. Nandy·May 7, 2026SaveLearn
Quasi-normal modes of a multi-dimensional rotating Kerr black holeThe aim of this paper is to present a general way to calculate quasi-normal modes (QNM) of the Teukolsky equation for higher dimensional (d > 4) Kerr spacetime with compactified extra dimensions. In…Mattia Villani·May 7, 2026SaveLearn
Scalar-Field Reconstruction of Ricci--Gauss--Bonnet Dark Energy in Hořava--Lifshitz CosmologyThis paper reports a Ricci-Gauss-Bonnet (RGB) dark energy model within the framework of Hořava-Lifshitz cosmology and presents a scalar-field reconstruction of the effective dark energy sector. In a…Surajit Chattopadhyay·May 7, 2026SaveLearn
Gravitational waves in metric-affine bumblebee gravityWe study the propagation and emission of gravitational waves in the metric-affine formulation of the bumblebee model, where spontaneous Lorentz symmetry breaking arises from a vector field acquiring…A. A. Araújo Filho·May 7, 2026SaveLearn
Teleparallel gravity from the principal bundle viewpointWe examine whether the Teleparallel Equivalent of General Relativity (TEGR) can be formulated as a gauge theory in the language of connections on principal bundles. We argue in favor of using either…Sebastian Brezina, Eugenia Boffo, Martin Krššák·May 7, 2026SaveLearn
Perturbations in the parametrized wormhole spacetime and their related quasinormal modesWe study electromagnetic perturbations and the associated quasinormal modes (QNMs) of parametrized static, spherically symmetric wormhole spacetimes, focusing on Damour-Solodukhin and braneworld…Shauvik Biswas, Sayan Chakrabarti·May 6, 2026SaveLearn
Canonical quantization of all minisuperspaces with consistent symmetry reductionsWe present the quantization of all symmetry reductions of the Einstein--Hilbert Lagrangian that correctly reproduce the reduced Einstein's field equations -- i.e., characterized by the…Poula Tadros, Ivan Kolář, Otakar Svítek·May 6, 2026SaveLearn
Analytical solution of traversable wormholes in the presence of positive cosmological constantThe construction of traversable wormholes with a cosmological constant, Λ, introduces significant challenges and leads to non-trivial modifications of the spacetime geometry. In this work, we…Rajesh Karmakar, Xian-Hui Ge·May 6, 2026SaveLearn
Extended thermodynamics and P-v Criticality of Kalb-Ramond black hole coupled with nonlinear electrodynamicsWe present an exact black hole solution in anti-de Sitter (AdS) spacetime with a Kalb-Ramond field coupled to nonlinear electrodynamics (NLED), characterized by mass, magnetic monopole charge, and…D. V. Singh, S. Upadhyay, P. Paul et al.·May 6, 2026SaveLearn
Light Deflection and Greybody Bound Around a BTZ-ModMax Black Hole in Plasma MediumWe study the deflection of light in a homogeneous plasma medium around a BTZ-ModMax black hole, focusing on the effects of the ModMax nonlinear electrodynamics parameter and the cosmological…Ritesh Pandey, Shubham Kala, Amare Abebe et al.·May 6, 2026SaveLearn
Quantum gravitational contrast in creating Schrödinger cat stateIn this paper, we illustrate how a Schrödinger cat state created via a matter-wave interferometer can be viewed as the simplest quantum-gravity setup where we can treat both matter and gravity on an…Anupam Mazumdar, Tian Zhou·May 6, 2026SaveLearn
Reconstruction Between Generalized Hybrid Metric--Palatini Gravity and Φ(R,ϕ,X) TheoriesWe develop a local reconstruction framework between Φ(R,ϕ,X) theories with linear dependence on X and generalized hybrid metric--Palatini gravity. The construction is formulated in vacuum in the…Jonathan Ramírez·May 6, 2026SaveLearn
Perturbations and greybody bounds of Euler-Heisenberg black holes surrounded by perfect fluid dark matterWe investigate the propagation of massless fields with spins s=0, s=1, and s=1/2 in the spacetime of an Euler-Heisenberg (EH) black hole surrounded by perfect fluid dark matter (PFDM). This…Fernando M. Belchior, Faizuddin Ahmed, Edilberto O. Silva·May 6, 2026SaveLearn
Hawking Temperature, Sparsity and Energy Emission Rate of Regular Black Holes Supported by Primordial Dark MatterIn this paper, we investigate the thermodynamic and radiative properties of a regular black hole sourced by primordial dark matter (PDM), modeled effectively through a Dirac--Born--Infeld (DBI)…Faizuddin Ahmed, Ahmad Al-Badawi, Edilberto O. Silva·May 6, 2026SaveLearn
The Impact of Spin Priors on Parameterized Tests of General RelativitySpin priors play a fundamental role in gravitational-wave parameter estimation, yet their impact on parameterized tests of General Relativity (GR) remains insufficiently understood. In this work, we…Tianhao Wu, Shujun Rong·May 6, 2026SaveLearn
Emergent gravity from nonlinear perturbation of spherical accretion with variable adiabatic indexThe main aim of the present work is to demonstrate that the analogue gravity phenomena are not an artifact of linear perturbation, rather gravity-like effects emerge through the non linear higher…Rohit Ghosh, Souvik Ghose, Biplab Raychaudhuri et al.·May 5, 2026SaveLearn
A Master Equation for Screening in Luminal Horndeski GravityDetermining the active screening mechanism from a general scalar-tensor Lagrangian remains a challenging problem. As a diagnostic tool, we present a systematic study of nonlinear cosmological…Sergi Sirera, Tessa Baker, James Hallam et al.·May 5, 2026SaveLearn
Shadow of a Noncommutative Thin-Shell GravastarOne of the main challenges in astronomy is the direct observation of black holes. However, distinguishing black holes from ultra-compact horizonless objects through photon observations can be…M. A. Anacleto, A. T. N. Silva, L. Casarini·May 5, 2026SaveLearn
Ringdown analysis of GW250114 with orthonormal modesGW250114 is the loudest gravitational wave event to date observed by LIGO-Virgo-KAGRA Collaboration. Owing to its high signal-to-noise ratio (SNR), previous analyses based on quasinormal mode (QNM)…Motoki Suzuki, Kei-ichiro Kubota, Soichiro Morisaki et al.·May 5, 2026SaveLearn
Families of regular spacetimes and energy conditionsWe present a systematic method for constructing static, spherically symmetric regular spacetimes in general relativity satisfying the weak energy condition. Our approach relies on physically…Zi-Liang Wang, Emmanuele Battista·May 5, 2026SaveLearn
Noether charges and the first law of thermodynamics for multifractional Schwarzschild black hole in the q-derivative theoryIn this paper, we investigate black-hole thermodynamics in the multi-fractional theory with q-derivatives, focusing on static, spherically symmetric vacuum solutions in the spherical-coordinate…Reggie C. Pantig·May 5, 2026SaveLearn
Black-Hole Scattering in Einstein-scalar-Gauss-Bonnet: Numerical Relativity Meets AnalyticsThe study of hyperbolic binary black hole encounters yields an effective probe of the strong field regime of black holes, thus providing an additional channel to test General Relativity. We study the…Shaun Swain, Tamanna Jain, Llibert Aresté Saló·May 5, 2026SaveLearn
Unifying the Regge-Wheeler-Zerilli and Bardeen-Press-Teukolsky formalisms on spherical backgroundsWe develop a formulation of perturbation theory on spherically symmetric backgrounds based on self-dual curvature equations combined with spherical harmonic expansions. The resulting framework…David Pereñiguez·May 5, 2026SaveLearn
Testing an anisotropic spinor field--based Modified Chaplygin Gas model in Kantowski--Sachs spacetime with observational constraintsWe investigate a cosmological model based on a massless nonlinear spinor field coupled to a Modified Chaplygin Gas (MCG) in the Kantowski--Sachs spacetime, aiming to probe anisotropies and unified…Mahendra Goray, Bijan Saha·May 5, 2026SaveLearn
Comparative Study of f(T) Gravity Models with Observational Constraints from OHD and Pantheon+ datasetsThe late-time acceleration of the universe remains one of the most significant open problems in modern cosmology. Modified gravity frameworks such as f(T) gravity provide a geometric alternative to…Anirudh Pradhan, S. A. Salve, V. B. Raut et al.·May 5, 2026SaveLearn