Purely Electric, Magnetic, and Dyonic Black Holes in Einstein-Euler-Heisenberg TheoryWe investigate static, spherically symmetric charged black holes in Einstein gravity coupled to Euler--Heisenberg (EH) nonlinear electrodynamics, including purely electric, purely magnetic, and…Haoyuan Luo, Nan Cao, Xiao Yan Chew et al.·Jul 24, 2026SaveLearn
From the Early Slope to Curvature: Future Prospects and challenges for Astrophysical Parameter Estimation Using the Core-Collapse Supernova High-Frequency FeatureGravitational-wave (GW) signals from core-collapse supernovae (CCSNe) contain both stochastic and deterministic components. Among these, the High-Frequency Feature (HFF), associated with PNS…Alejandro Casallas-Lagos, Marek Szczepańczyk, Michele Zanolin et al.·Jul 24, 2026SaveLearn
Classifying the nuclear equation of state in LVK interferometric noise through core-collapse supernova gravitational-wave signatures using convolutional neural networksThis paper presents a convolutional neural network (CNN) approach to classifying the nuclear equation of state (EOS). As illustrative examples, we use five two-dimensional core-collapse supernova…Alejandro Casallas-Lagos, Marek J. Szczepańczyk, Michele Zanolin et al.·Jul 24, 2026SaveLearn
Spin-mediated modulation of chaos bound violation in Lorentz-violating black hole spacetimesWe investigate how the particle spin modulates chaos bound violations in Lorentz-violating black hole spacetimes within the framework of Bumblebee gravity. Using the Mathisson-Papapetrou-Dixon…Chuang Yang, Deyou Chen, Bingbing Chen·Jul 24, 2026SaveLearn
Two discs and a missing triangle: the maximally extended Kerr black hole revisitedThe region spaning the ring singularity in the Kerr black hole solution is described here as two (flat) discs rather than one. From this viewpoint it follows that the usual depiction of the…Malcolm A. H. MacCallum·Jul 24, 2026SaveLearn
Thermodynamics of Kerr-Bertotti-Robinson black holeWe investigate the thermodynamic properties of the Kerr-Bertotti-Robinson black hole, an exact Petrov type-D solution of Einstein-Maxwell theory describing a rotating black hole immersed in an…Li Hu, Rong-Gen Cai, Shao-Jiang Wang·Jul 24, 2026SaveLearn
Black Hole Mergers as the Fastest Photon Ring ScramblersBlack holes are the most efficient scramblers in nature. By mapping the instantaneous mass and angular momentum of two spinless black holes in a quasi-circular binary onto those of an effective Kerr…D. Giataganas, G. F. Giudice, A. Ianniccari et al.·Jul 24, 2026SaveLearn
Junction Conditions for General Gravitational TheoriesThe junction conditions for general theories of gravity based on actions that depend on arbitrary functions of the curvature scalar invariants (including differential invariants) are obtained using…José M. M. Senovilla·Jul 24, 2026SaveLearn
Conformal Geometry and Regularization of Disclinations by a Cosmological Constant in (2+1) DimensionsWe investigate the effect of a cosmological constant Λ on the geometry generated by a two-dimensional disclination in a conformal metric framework. For Λ>0, we obtain an exact analytic solution…A. Carvalho, C. Furtado·Jul 24, 2026SaveLearn
The Frame-Dragging effect on the excitation rate of atomsThe frame-dragging phenomenon in gravitational fields is revisited to explore the geometric effects induced by spacetime curvature. We quantize a massless scalar field in the spacetime of a rotating…Rui-Chen Liu, C. P. Sun·Jul 24, 2026SaveLearn
Higher-order generalized uncertainty principle corrections to Casimir-supported traversable wormholesWe investigate traversable wormholes supported by Casimir vacuum energy with second-order generalized uncertainty principle (GUP) corrections. For two representative GUP models, we derive…Jureeporn Yuennan, Allah Ditta, Thammarong Eadkhong et al.·Jul 23, 2026SaveLearn
Soliton-Black Hole Phase Transitions in the Presence of String CloudsWe study soliton-black hole phase transitions in asymptotically AdS planar spacetimes sourced by a cloud of strings. In the planar background, the string cloud exhibits a brush-like configuration,…Ziqing Chen, Robert B. Mann·Jul 23, 2026SaveLearn
Unit Killing Initial DataWe find a system of differential equations on an initial data surface whose solutions are in bijection with unit vector fields on the Einstein Λ-vacuum development that are proportional to a…Igor Khavkine, Salvador Mengual Sendra·Jul 23, 2026SaveLearn
Quantum-Corrected Thermodynamics, Dirac Perturbations, Geodesic Structure, and Topological Phases of Black Holes with Non-Minimal Logarithmic CouplingWe study the thermodynamic and dynamical properties of static, spherically symmetric BHs in Einstein-Maxwell theory modified by a non-minimal (R)F2 coupling. The Hawking temperature follows…İzzet Sakallı, Özcan Sert, Erdem Sucu et al.·Jul 23, 2026SaveLearn
Local Geometric Bounds on Generalized Entropy Evolution along Null HorizonsWe develop a local and covariant framework for constraining the evolution of generalized entropy along null horizons, combining classical geometric methods with constraints from quantum field theory.…Erik Bertram·Jul 23, 2026SaveLearn
Gravitational Lensing in a Kasner Background: Distinguishing Wormholes and Black HolesWe investigate gravitational lensing by compact objects embedded in anisotropic Bianchi-I cosmologies using directional Jacobi maps within the thin-lens approximation. The formalism is developed for…Celio R. Muniz, Jonathan A. Rebouças, M. B. Cruz et al.·Jul 23, 2026SaveLearn
Viscosity effects on the shadow of a non-rotating black holeWe study the effect of shear viscosity in stationary magnetized accretion tori on synthetic images of non-rotating black hole shadows. Shear viscosity and spacetime-curvature contributions are…Sayantani Lahiri, Sergio Gimeno-Soler, Alejandro Cruz-Osorio et al.·Jul 23, 2026SaveLearn
Bulk Viscosity and Thermodynamic Approaches to Singularity Resolution in Non-Metric GravityThis manuscript investigates the impact of bulk viscosity on the viability of cosmic bounce solutions in the context of f(Q) theory, where Q is a non-metricity scalar. To…M. Sharif, M. Zeeshan Gul, Nusrat Fatima·Jul 23, 2026SaveLearn
Thermal bath induced suppression of Hawking radiationThe cosmic microwave background radiation or particles surrounding a black hole can be modeled as a thermal bath coupled to the black hole. In this study, we investigate the effects of such a thermal…Hong Wang, Jin Wang·Jul 23, 2026SaveLearn
A story about a tipsy kangaroo: Reversible jump MCMC for model selection in the analysis of gravitational-wave signals from the coalescence of compact objectsBayesian inference is commonly employed in the analysis of gravitational-wave signals not only to estimate the source parameters, but also for model selection. The latter provides insight into the…Anna Puecher, Tim Dietrich, Hauke Koehn et al.·Jul 23, 2026SaveLearn
Octupole moments and the non-universality of free-fall in general relativityExtended bodies in general relativity do not necessarily fall along geodesics, but can be accelerated. These accelerations depend on an object's angular momentum, as well as on its quadrupole,…Abraham I. Harte, Paul Ramond·Jul 23, 2026SaveLearn
Cosmological initial data without periodic boundary conditionsWe apply the parabolic-hyperbolic formulation of the Einstein constraint equations to generate cosmological initial data. The freely specifiable geometric data correspond to flat…Károly Csukás·Jul 23, 2026SaveLearn
Zipoy--Voorhees spacetime with Maxwell and dilaton fields: exact solution and equatorial geodesicsWe derive a new exact solution of four-dimensional Kaluza-Klein theory by applying the uplift-boost-reduction procedure to the Zipoy-Voorhees vacuum seed. The resulting Zipoy-Voorhees-dilaton…Haryanto M. Siahaan·Jul 23, 2026SaveLearn
The leading-soft cubic graviton self-interaction on the black-hole horizonWe expand the Einstein--Hilbert action to cubic order about the Schwarzschild horizon, in the even Regge--Wheeler gauge of the Gaddam--Groenenboom--'t~Hooft near-horizon framework, and derive the…Ayanendu Dutta·Jul 23, 2026SaveLearn
New generalization of the Barboza-Alcaniz parametrization of Dark energyA generalization of the Barboza-Alcaniz parametrization of dark energy is proposed. This is a three-parameter model which can resolve the shortcomings of the Barboza-Alcaniz behavior at future times.…Shahab Shahidi·Jul 23, 2026SaveLearn