Thermal false vacuum decay near black holes is asphericalWe study decay of a scalar field false vacuum near a (3+1)-dimensional Schwarzschild black hole equilibrated at Hawking temperature with the environment. Our scalar field model has negative quartic…D. S. Gorbunov, D. G. Levkov, V. E. Maslov·Aug 12, 2026SaveLearn
On the Stability of the Euler-Poisson Dark-Fluid ModelWe present a stability analysis of a dark-fluid model described as a non-relativistic, rotating, non-viscous, self-gravitating fluid. We assume spherical symmetry and model the matter by a polytropic…Balázs Endre Szigeti, Imre Ferenc Barna, Gergely Gábor Barnaföldi·Aug 12, 2026SaveLearn
From a Sharp Thin-Shell Obstruction to a Smooth Positive-Density Initial-Data Embedding of a Virialized Halo in Lambda-FLRW CosmologyWithin classical general relativity, we compare a sharp timelike junction and a smooth finite-width spacelike initial-data embedding of a positive-excess virialized halo in a homogeneous Lambda-FLRW…Seokcheon Lee·Aug 12, 2026SaveLearn
Phase-plane formulation of weak gravitational deflection in static spherical spacetimesThis paper develops a phase-plane formulation of gravitational light deflection by static and spherically symmetric black holes, with Schwarzschild spacetime as the principal case. Instead of…Reggie C. Pantig, Ali Övgün·Aug 12, 2026SaveLearn
Rainbow McVittie Horizons in an Expanding UniverseWe derive the Friedmann dynamics and apparent-horizon thermodynamics of a spatially flat McVittie spacetime in Gravity's Rainbow and construct a consistent non-accreting perfect-fluid sector with…Amani Ashour, Ahmed Farag Ali·Aug 12, 2026SaveLearn
A Covariant Distributional Approach for Junctions in Torsional Locally Rotationally Symmetric Class II SpacetimesA rigorous framework for consistent study of junctions in a coordinate independent manner is presented. This is achieved by extending a theory of distributions in curved spacetimes with torsion and…Ujjwal Agarwal, Sante Carloni·Aug 12, 2026SaveLearn
Finding black hole spins efficiently during a numerical binary evolutionThe dynamics of a binary black hole system depend on its masses and spins. For a binary at finite separation, it is not possible to define these quantities in an unambiguous way; however, there are…Himanshu Chaudhary, Rob Owen, Mark A. Scheel et al.·Aug 12, 2026SaveLearn
Robustness of the primordial power spectrum in hybrid loop quantum cosmology to approximations near the bounceWe prove the robustness of the analytic approximation used in (hybrid) loop quantum cosmology to compute the primordial power spectrum of the cosmological perturbations for a recently proposed vacuum…Kristina Giesel, Almudena Guillén, Guillermo A. Mena Marugán et al.·Aug 12, 2026SaveLearn
Models of a point particle in a three-dimensional AdS universeIn 2+1-dimensional gravity, a conical deficit is commonly interpreted as a point-like particle. A distributional description of such a source is problematic since the Einstein equations are non-…Petr Lukeš, Pavel Krtouš·Aug 12, 2026SaveLearn
Coherent quantum geometry: de Sitter spacetime in different foliationsIn any theory of quantum gravity, an interesting question to address is to what extent known solutions of the Einstein field equations can be obtained as expectation values of metric operators on…Tommaso Bambagiotti, Roberto Casadio, Andrea Giusti et al.·Aug 12, 2026SaveLearn
Lorentz Symmetry Breaking Traversable Wormhole Models Supported by Einasto Dark MatterWe investigate static, spherically symmetric traversable wormholes in Kalb Ramond gravity, where spontaneous Lorentz symmetry breaking arises from a non-vanishing vacuum expectation value of the…Rana Muhammad Zulqarnain, M. Yousaf, Allah Ditta et al.·Aug 12, 2026SaveLearn
Emergent scalar field dynamics in a cosmological spacetime from GFT quantum gravityWe derive an effective scalar field theory for matter in group field theory condensate cosmology, starting from the fundamental quantum-gravity dynamics in a fully relational framework and…Roukaya Dekhil, Federico Greco, Stefano Liberati et al.·Aug 12, 2026SaveLearn
Blandford-Znajek Scaling in a Power-Law Rotating Kalb-Ramond Geometry: Magnetic-Flux Systematics and Bayesian IdentifiabilityRelativistic jets from spinning black holes offer a possible strong-field probe of gravity through the Blandford-Znajek mechanism. We study the leading jet-power scaling in the four-dimensional…Sardor Murodov, Olimjon Kholturayev, Bekzod Rahmatov et al.·Aug 12, 2026SaveLearn
Squeezed quantum states and partner modes in the moving mirror model of black hole evaporationThe standard moving mirror model in (1+1)-dimensional spacetime is known to reproduce several quantum aspects of black hole evaporation. A perfectly reflecting, accelerating mirror can emit radiation…Kuan-Nan Lin, Pisin Chen, Michael R. R. Good et al.·Aug 12, 2026SaveLearn
Static multipolar Einstein-vector-Gauss-Bonnet black holesWe construct and analyze static multipolar black holes in Einstein-vector-Gauss-Bonnet theory with a quadratic coupling function. The vectorized solutions bifurcate from the Schwarzschild black hole…Burkhard Kleihaus, Jutta Kunz·Aug 12, 2026SaveLearn
Taiji Resolving Power for the Transverse Scalar Mode of Gravitational WavesWe investigate how small a co-propagating transverse-scalar component can be resolved by Taiji in an already identified bright tensor chirp. Using a source-tracked tensor-null response, we formulate…Bo-Xuan Ge, Zhoujian Cao·Aug 12, 2026SaveLearn
A Nonsingular Logarithmic Bouncing Cosmology in f(R,T) Gravity with Thermodynamic ViabilityWe present a nonsingular bouncing cosmological model in the framework of modified f(R,T) gravity within a spatially flat Friedmann--Robertson--Walker universe. A logarithmic time-dependent scale…Anjani, Pankaj Kumar, S. H. Shekh et al.·Aug 12, 2026SaveLearn
Vishveshwara's waveform revisited: insights from a Keldysh quasinormal mode expansionWe revisit Vishveshwara's linear scattering on a Schwarzschild black hole to study the evolution of quasinormal mode activation along the full time-domain waveform. Specifically, by adopting a…Jérémy Besson, José Luis Jaramillo·Aug 12, 2026SaveLearn
Trapped surface formation via radial boostsWork of Christodoulou, Klainerman, Rodnianski, Luk, An, and others has provided a number of results on the dynamical formation of trapped surfaces in vacuum solutions to the Einstein field equations.…Nathan Thomas Carruth·Aug 12, 2026SaveLearn
Constraints on ultralight bosons from merging binary and remnant black holes observed during the second and third parts of the fourth LIGO-Virgo-KAGRA observing runWe present constraints on ultralight bosons using binary black hole mergers observed in the second and third parts of the fourth LIGO-Virgo-KAGRA observing run. Directed searches are conducted for…The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration et al.·Aug 12, 2026SaveLearn
Pressure profile bounds from relaxing the TOV equationWe develop several new and quite general bounds on the internal pressure profiles of general relativistic perfect fluid spheres --- based on various ways of relaxing the TOV system of ODEs to obtain…Christopher Simmonds, Matt Visser·Aug 12, 2026SaveLearn
On Super-Hyperbolic Wormhole Geometries and their DeformationsIn this study, we developed a unified geometric and relativistic framework for a new family of traversable wormholes constructed from a super-hyperbolic deformation of the classical catenoid, whose…Subrat Parida·Aug 11, 2026SaveLearn
Effects of Quantum Spin-Connection Foam in the Solar System, Galaxies, and the UniverseWe argue that effects of the quantum spin-connection foam, which describes quantum gravity according to the precanonical quantization of General Relativity, may already be observed in the form of the…Igor V. Kanatchikov, Valery A. Kholodnyi·Aug 11, 2026SaveLearn
Investigation of Circular Photon Orbits in Naked Singularity Spacetimes from a Geometric MethodCircular photon orbits play a pivotal role in both gravitational theories and astronomical observations. However, the properties of circular photon orbits in naked singularity spacetimes remain…Qing-Rong Xie, Chen-Kai Qiao·Aug 11, 2026SaveLearn
Torsional pseudo-inflation beyond Einstein-CartanTorsion entered early-universe cosmology twice: through the nonsingular Einstein--Cartan bounce, where the quantum spin of fermions halts the contraction, and through the proposal that the expansion…Fernando Izaurieta, Samuel Lepe, Cristian Quinzacara·Aug 11, 2026SaveLearn