Self-consistent Hubble expansion in exponential teleparallel gravity: confrontation with recent observationsWe reconstruct the Hubble expansion history in exponential teleparallel gravity using recent cosmological observations, including Observational Hubble Data (OHD), the Dark Energy Spectroscopic…K. S. Kavya, T. Vinutha, B. Revathi et al.·Jun 3, 2026SaveLearn
Spectral instability of parametrized black hole quasinormal modes in the high-overtone limit via the exact WKB analysisWe study the asymptotic behavior of parametrized black hole quasinormal modes (QNMs) in the high-overtone limit. To gain insights into their analytical structure, we apply the exact WKB method, which…Taiga Miyachi, Ryo Namba, Hidetoshi Omiya et al.·Jun 3, 2026SaveLearn
Observable Gravitational Wave Strain at Second OrderThere is currently no rigorous definition of gravitational wave strain at second order in cosmological perturbation theory. The usual association of gravitational waves with transverse and traceless…Guillem Domènech, Shi Pi, Ao Wang·Jun 3, 2026SaveLearn
Mixmaster Fluids Near the Big BangWe numerically study the approach to the singularity in T2-symmetric cosmological spacetimes containing a non-stiff perfect fluid satisfying a linear equation of state p=Kρ, $K ∈…Elliot Marshall·Jun 3, 2026SaveLearn
Inflationary assessment of F(R,R) Einstein-Cartan modelsIn the framework of F(R,R) Einstein-Cartan gravity with an action depending both of the Ricci scalar and the so-called Holst-invariant curvature we consider models that…Theodoros Katsoulas, Kyriakos Tamvakis·Jun 3, 2026SaveLearn
Inferring the stochastic gravitational-wave background from eccentric stellar-mass binary black holes with spaceborne detectorsThe stochastic gravitational-wave background (SGWB) from eccentric stellar-mass binary black holes (SBBHs) holds crucial clues to their origins. For the first time, we employ a Bayesian framework to…Zheng-Cheng Liang, Zhi-Yuan Li, Yi-Ming Hu·Jun 3, 2026SaveLearn
Odd-parity perturbations of trace-quadratic f(R,T) black holes with anisotropic matter: admissible branches, axial ringdown, and a coupled-PINN benchmarkWe study odd-parity gravitational perturbations of static black holes in trace-quadratic f(R,T)=R+αT2 gravity supported by an anisotropic effective fluid with constant closure parameters…Mushtaq Ahmad, M. Farasat Shamir, Adnan Malik et al.·Jun 2, 2026SaveLearn
Shape of U: Measuring the Curvature of the Universe with Gravitational WavesGravitational waves (GWs) from compact binary mergers are standard sirens that can measure distances across the Universe without external calibrators. When an electromagnetic counterpart enables an…Arindam Sharma, Ish Gupta, Anuradha Gupta·Jun 2, 2026SaveLearn
Gravitationally Induced Quantum Decoherence of Macroscopic ObjectsWe formulate the gravitationally induced quantum decoherence of a massive object prepared in a spatial superposition. Starting from linearized gravity coupled to a massive system particle and an…Hiroki Takeda, Shogo Tomizuka, Takahiro Tanaka·Jun 2, 2026SaveLearn
Scattering and Hawking Radiation from Einstein--Euler--Heisenberg--de Sitter Black HolesWe compute neutral scalar and neutral massless Dirac greybody factors and Hawking spectra for the positive-cosmological-constant branch of the Einstein--Euler--Heisenberg black hole. The finite…Jayden Tan·Jun 2, 2026SaveLearn
A master equation for Carter-separable stationary axisymmetric spacetimes and compatible sourcesWe show that the remaining diagonal Einstein equations in the Carter-projective sector of stationary axisymmetric spacetimes are equivalent to a single sourced master equation. The projective…Hyeong-Chan Kim·Jun 2, 2026SaveLearn
Critical collapse of a self-interacting scalar field in asymptotically anti-de Sitter spacetimeWe study the critical gravitational collapse of a spherically symmetric massless scalar field in asymptotically anti-de Sitter (AdS) spacetime. The scalar field potential adopted here is inversely…Li-Jie Xin, Xiangdong Zhang·Jun 2, 2026SaveLearn
Quantum Matter Makes Lightcones QuantumIn gravitational physics, matter does not merely move within spacetime; it also determines the light cones that define causal relations. What happens when the matter that determines these light cones…Tomohiro Fujita, Misao Sasaki·Jun 2, 2026SaveLearn
A Plunge into the Chasm: Surviving Tidal Effects in Kerr SpacetimeWe investigate the fate of an observer falling towards a Kerr black hole. The tidal forces are computed for arbitrary trajectories of an observer, and we specify them along the polar axis in order to…Guillaume Lhost, Ornella Ruta, Claude Semay·Jun 2, 2026SaveLearn
Models of exponential and power-law acceleration of the Universe in Horndeski theory without ghosts and Laplace instabilitiesWe present a designer method for flat Friedman-Robertson-Walker space-times within the framework of Horndeski's scalar-tensor theory. As a result, one can find subclasses of Horndeski's…Ruslan K. Muharlyamov, Tatiana N. Pankratyeva, Shehabaldeen O. A. Bashir·Jun 2, 2026SaveLearn
Model-Independent Search Discards Faint Lensed-Pairs of Gravitational Wave Events in the Sub-Threshold Candidates of GWTC-4Gravitational lensing of gravitational waves (GWs) can produce multiple images in the geometric optics limit. These lensed GW images arrive at different times, are amplified by different…Aniruddha Chakraborty, Suvodip Mukherjee·Jun 2, 2026SaveLearn
Thermodynamical phase structures and particle emission rate of charged AdS black hole surrounded by string cloud and quintessence via shadow formalismIn this paper, the shadow of the four-dimensional charged AdS black hole surrounded by string cloud and quintessence is derived. The shadow radius shows a strictly monotonic and invertible…Yunxiang Wang, Hongyu Chen, Juhua Chen et al.·Jun 2, 2026SaveLearn
Lorentz-violating signatures in quasi-periodic oscillations from a magnetised Kalb-Ramond black holeWe investigate the dynamics of charged particles around a Schwarzschild-like black hole sourced by a Kalb-Ramond field and immersed in a uniform external magnetic field. The Kalb-Ramond field…Luiz F. G. Rodrigues, Francisco S. N. Lobo, Manuel E. Rodrigues·Jun 2, 2026SaveLearn
Off-shell Hessian thermodynamic stability of higher-curvature black holesWe develop a branch-sensitive thermodynamic framework for higher-curvature black holes using the off-shell Gibbs free energy G off and the Wald entropySW as the basic data. On…Chen-Hao Hao, Jieci Wang·Jun 2, 2026SaveLearn
Vector modes in Type 3 New GRSome time ago, we published the full count of degrees of freedom in the linearised weak gravity limit of arbitrary New GR models. We did it by considering the linear weak gravity equations and…Alexey Golovnev·Jun 2, 2026SaveLearn
Regular hairy black holes by gravitational decoupling: Bardeen and Minkowski-core seedsWe construct two families of regular hairy black holes within gravitational decoupling using a fixed exponential deformation profile for an effective tensor-vacuum sector. The first family is…Daulet Berkimbayev·Jun 2, 2026SaveLearn
Covariant quantization of the Einstein-Hilbert theory in first-order formWe present a covariant quantization of the first-order formulation of the Einstein-Hilbert theory using the path integral and BV formalisms. In this approach, the metric gμν and the connection…S. Martins-Filho·Jun 2, 2026SaveLearn
Light rings, gravitational lensing, and ISCOs of exotic compact objects in Einstein-scalar-Maxwell theoriesIn Einstein-scalar-Maxwell theories with a coupling between the scalar field ϕ and the electromagnetic field strength F of the form μ(ϕ) F, we investigate the existence of exotic compact…Antonio De Felice, Shinji Tsujikawa·Jun 2, 2026SaveLearn
On the Gravitational Energy of Axial Perturbations in Regular Black HolesThe article deals with the gravitational energy associated with axial perturbations of regular black holes. We review the stability of the geometry under odd-parity perturbations and the…S. C. Ulhoa, F. L. Carneiro, B. C. C. Carneiro·Jun 2, 2026SaveLearn
Exceptional Lines and Excitation of (Nearly) Double-Pole Quasinormal Modes: A Semi-Analytic Study in the Nariai Black HoleWe show that quasinormal modes (QNMs) of a massive scalar field in Kerr-de Sitter and Myers-Perry black holes exhibit an exceptional line (EL), which is a continuous set of exceptional points (EPs)…Nao Nakamoto, Naritaka Oshita·Jun 2, 2026SaveLearn