Thermodynamic, Optical, and Orbital Signatures of Regular Asymptotically Flat Black Holes in Quasi-Topological GravityThis study provides an analytic and numerical characterization of a class of regular, asymptotically flat black holes described by a deformed static spherical metric. The model is grounded in a…Zainab Malik·Mar 25, 2026SaveLearn
Phase Structure of Scalarized Black Holes in Einstein-Scalar-Gauss-Bonnet GravityWe revisit scalarized black holes in Einstein-scalar-Gauss-Bonnet gravity and analyze the thermodynamic phase transition between the Schwarzschild solution of general relativity and scalarized black…Carlos Herdeiro, Hyat Huang, Jutta Kunz et al.·Mar 25, 2026SaveLearn
Horizon Multipole Moments of a Kerr Black HoleThe horizon multipole moments of a Kerr black hole are computed from two distinct definitions that have been proposed in the literature. The first one [Ashtekar et al., Class. Quantum Grav. 21, 2549…Eric Gourgoulhon, Alexandre Le Tiec, Marc Casals·Mar 25, 2026SaveLearn
Review of strongly coupled regimes in gravity with Dyson-Schwinger approachWe analyze various gravity theories involving de-Sitter, quadratic R2 and non-minimally coupled scalar in the light of application of the Dyson-Schwinger technique involving exact…Marco Frasca, Anish Ghoshal·Mar 24, 2026SaveLearn
Testing Dark Energy with Black Hole RingdownWe show that dynamical dark energy theories can imprint O(1) modifications on the quasi-normal mode (QNM) spectrum characterising black hole ringdown. The time dependence of dynamical dark energy…Laurens Smulders, Johannes Noller, Sergi Sirera·Mar 24, 2026SaveLearn
Energy conditions of bouncing solutions in quadratic curvature gravity coupled with a scalar fieldWe examine the validity of classical energy conditions in nonsingular bouncing cosmological solutions arising in quadratic curvature gravity minimally coupled to a scalar field. Focusing on the null,…Yuki Hashimoto, Kazuharu Bamba, Sanjay Mandal·Mar 24, 2026SaveLearn
Solutions of the constraints with controlled decay to Kerr, including Schwartz decayWe show that to every small and decaying solution of the linearized constraint equations about Minkowski spacetime, one can add a quadratically small correction to obtain a solution of the full…Andrea Nützi·Mar 24, 2026SaveLearn
Inflation driven by a bare cosmological constant and its graceful exitVacuum energy, a prediction of quantum field theory, manifests itself as a cosmological constant in general relativity. In this Letter, we propose a novel inflationary scenario driven by a bare…Chengsheng Mu, Shuxun Tian, Shuo Cao et al.·Mar 24, 2026SaveLearn
Nonlinear spinor field with Lyras geometry: Bianchi type-VI space-timeIn the context of a Bianchi type-VI space-time characterized by Lyras geometry, we investigate the influence of a nonlinear spinor field on the evolution of the Universe. Our previous research has…Bijan Saha·Mar 24, 2026SaveLearn
Virtual absorption modes of Schwarzschild-de Sitter spacetimes in semi-open systemsWe present a study of virtual absorption modes (VAMs) in Schwarzschild-de Sitter (SdS) spacetime under semi-open boundary conditions, where the VAMs correspond to total transmission modes (TTMs) with…Liang-Bi Wu, Yu-Sen Zhou, Zhe Yu et al.·Mar 24, 2026SaveLearn
Dark energy stars from the modified Chaplygin gas: C-I-Λ-Eg-f universal relationsDark energy stars (DESs), described by the modified Chaplygin gas (MCG), can be dynamically stable and fall within different observational measurements. In this work, we employ diverse macroscopic…Krishna Pada Das, Juan M. Z. Pretel·Mar 24, 2026SaveLearn
Peeling-violating coefficients in classical gravitational scatteringUsing matching properties of the gravitational field at timelike and spatial infinity, together with universal formulas for gravitational wave tails, we obtain exact expressions for the…Gianni Boschetti, Miguel Campiglia·Mar 24, 2026SaveLearn
Choosing the phase for the spin-weighted spheroidal functionsThe spin-weighted spheroidal functions are the eigenfunctions of the angular Teukolsky equation. They are a generalization of the widely used spin-weighted spherical functions, and are extremely…Gregory B. Cook, Xiyue Wang·Mar 23, 2026SaveLearn
Stable black hole solutions with cosmological hairDynamical dark energy theories generically introduce a time-dependent field that causes the accelerated expansion of the Universe on large scales. When embedding black hole solutions in such a…Laurens Smulders, Johannes Noller·Mar 23, 2026SaveLearn
Exceptional Points in Quasinormal Spectra of Hairy Black HolesExceptional points (EPs) in quasinormal mode (QNM) spectra are non-Hermitian degeneracies at which both the eigenvalues and eigenfunctions coalesce. In this paper, we identify an EP in the scalar QNM…Lang Cheng, Xiaobo Guo, Yuhan Li et al.·Mar 23, 2026SaveLearn
Spontaneous scalarization of neutron stars in teleparallel gravity with derivative torsional couplingWe study neutron star configurations in a teleparallel gravity model featuring a scalar field coupled to both matter and torsion. In the Einstein frame, the theory includes a derivative coupling…Youcef Kehal, Khireddine Nouicer·Mar 23, 2026SaveLearn
Reconstructed black hole solutions in the scalar-tensor theory with nonminimal couplingWe consider the scalar-tensor theory witn non-minimal coupling in the Jordan frame. The action of the model contains a potential term U(φ), a coupling function f(φ). We explore a reconstruction…K. K. Ernazarov·Mar 23, 2026SaveLearn
Quantum Tunneling of Primordial Black Holes to White Holes: Rates, Constraints, and Implications for Fast Radio BurstsWe calculate the present-day and cosmological volumetric rate of primordial black hole (PBH) quantum tunneling events to white holes, incorporating the competition between Hawking evaporation and…Christopher Ewasiuk, Stefano Profumo·Mar 23, 2026SaveLearn
High-order effective-one-body tidal interactions and gravitational scatteringUsing state-of-the-art scattering results in post-Minkowskian (PM) gravity, we improve the tidal sector of four different flavors of the effective-one-body (EOB) formalism. We notably explore both…Malte Schulze, Sebastiano Bernuzzi, Piero Rettegno et al.·Mar 23, 2026SaveLearn
Adiabatic renormalization for modified dispersion relations in cosmologyWe investigate the behavior of scalar quantum fields in cosmological backgrounds under modified dispersion relations, specifically focusing on how ultraviolet asymptotics influence field…Christian Durán-Romero, Luis J. Garay, Mercedes Martín-Benito et al.·Mar 23, 2026SaveLearn
Observational Constraints on Noncoincident f(Q)-Gravity with Matter-Gravity CouplingWe investigate f( Q) -gravity with a matter-gravity coupling as a geometric dark energy candidate for the description of the late-time cosmic acceleration within a spatially flat…Andronikos Paliathanasis·Mar 23, 2026SaveLearn
Entanglement degradation in regular and singular spacetimesWe study entanglement degradation near the horizons of regular, Reissner-Nordström, and Schwarzschild-de Sitter black holes, considering the Bardeen, Hayward, and generalized Hayward metrics as…Orlando Luongo, Stefano Mancini, Sebastiano Tomasi·Mar 23, 2026SaveLearn
Dark energy and accelerating cosmological evolution in a Universe with a Weylian boundaryWe investigate the influence of boundary terms in gravitational field theories, by considering that in the Einstein-Hilbert action the boundary can be described by a non-metric Weyl-type geometry.…Tiberiu Harko, Shahab Shahidi·Mar 23, 2026SaveLearn
Quasi-local thermodynamics of Kerr-Newman black holes: Pressure, volume, and shear workWhile the quasi-local thermodynamics of spherically symmetric black holes is well described by pressure and volume, extending this framework to rotating spacetimes poses a significant challenge.…Thiago Campos·Mar 22, 2026SaveLearn
Kaniadakis Holographic Dark Energy: UV-IR Duality, Horizon Thermodynamics and Cosmological ConstraintsWe investigate the cosmological and thermodynamic implications of holographic dark energy derived from the Kaniadakis deformation of the Bekenstein--Hawking entropy. In a spatially flat FLRW…Manuel Gonzalez-Espinoza, Samuel Lepe, Joel F. Saavedra et al.·Mar 22, 2026SaveLearn