When does entanglement through gravity imply gravitons?Detection of entanglement through the Newtonian potential has been claimed to support the existence of gravitons, by extrapolating to a thought experiment which demonstrates that complementarity and…Nikolaos Mitrakos, Maria Papageorgiou, T. Rick Perche et al.·Apr 15, 2026SaveLearn
Rényi Law Constraints on Gauß-Bonnet Black Hole MergerIn this article, we explore the Rényi law constraints on black hole merger in Gauß-Bonnet (GB) gravity. Specifically, we consider the case of static solutions in five-dimensional (5D) Anti-de-Sitter…Neeraj Kumar, Ankur Srivastav, Phongpichit Channuie·Apr 15, 2026SaveLearn
Quantum dust cores of black holes and their quasi-normal modesThe quantum description of a gravitationally collapsed ball of dust proposed in Ref.~Casadio:2023ymt is characterised by a linear effective Misner-Sharp-Hernandez mass function describing a…Tommaso Bambagiotti, Luca Gallerani, Andrea Mentrelli et al.·Apr 15, 2026SaveLearn
On the Metric Propagator and Affine Modes of Extended Hybrid Metric--Palatini Gravity with Ricci--Squared InvariantsWe investigate an extended hybrid metric--Palatini theory defined by an arbitrary function f(R,R,Q,Q,Q), where R and R are the metric and Palatini scalar…Jonathan Ramírez, Gustavo Melgarejo·Apr 14, 2026SaveLearn
Buchdahl Limit and TOV Equations in Interacting Vacuum ScenariosWe investigate the stability of ultra-compact stellar configurations in the context of an interacting vacuum component. By extending the Tolman-Oppenheimer-Volkoff equations to include a covariant…Rodrigo Maier·Apr 14, 2026SaveLearn
Observational constraints on nonlocal black holes via gravitational lensingIn this paper, we study the gravitational lensing around the static and spherically symmetric DD black holes, which we recently derived as perturbations of the Schwarzschild geometry within the…Rocco D'Agostino, Vittorio De Falco·Apr 14, 2026SaveLearn
Uniqueness of stationary axisymmetric type D black holes with non-aligned electromagnetic fieldWe demonstrate the uniqueness of the spacetimes recently found by us in [H. Ovcharenko and J. Podolsky, Phys. Rev. D 112 (2025) 064076]. First, we prove that the conformal-to-Carter metric ansatz we…Hryhorii Ovcharenko, Jiri Podolsky·Apr 14, 2026SaveLearn
Bilinear products and the orthogonality of quasinormal modes on hyperboloidal foliationsWe explore the properties of bilinear products for black-hole quasinormal modes (QNMs) formulated on hyperboloidal foliations. We find that, although QNM solutions are smooth and finite on…Marica Minucci, Rodrigo Panosso Macedo, Christiana Pantelidou et al.·Apr 14, 2026SaveLearn
Classical Spinors on Curved Spacetime: applications to Cosmology and AstrophysicsWe focus our attention on the spinor model proposed in an article by J. Magueijo et al. and we analyze it from the point of view of the cosmological background. We show that this model, under some…Andrea La Delfa·Apr 14, 2026SaveLearn
Black holes in general relativity coupled with NEDs surrounded by PFDM: thermodynamics, epicyclic oscillations, QPOs, and shadowIn this work, we investigate the thermodynamics and motion of neutral test particles around a regular black hole immersed in a perfect fluid dark matter environment. We begin by examining the horizon…Faizuddin Ahmed, Sardor Murodov, Bekzod Rahmatov·Apr 14, 2026SaveLearn
Cosmologically viable non-polynomial quasi-topological gravity: explicit models, ΛCDM limit and observational constraintsWe investigate the cosmological implications of non-polynomial quasi-topological gravity (NPQTG), a novel class of modified gravitational theories in which the background dynamics is encoded in a…Emmanuel N. Saridakis·Apr 14, 2026SaveLearn
Spectroscopy of analogue black holes using simulation-based inferenceThe emergence of precision gravity simulators in quantum and fluid systems is opening new avenues for probing curved-spacetime physics and black-hole phenomenology under controlled laboratory…Leonardo Solidoro, Sebastian H. Völkel, Silke Weinfurtner·Apr 14, 2026SaveLearn
Dark matter heating of Planet 9, and its observational implicationsThe observed unusual behaviors of the orbits of Trans-Neptunian objects as well as the gravitational anomalies detected by the Optical Gravitational Lensing Experiment can be explained by assuming…Tiberiu Harko·Apr 14, 2026SaveLearn
Mixmaster chaos in a quantum scenario:a Deformed Algebra approachIn this work, we address the question about the fate of chaos in the Mixmaster model when we promote the system at a quantum level. We consider Deformed Commutation Relations for the Misner…Eleonora Giovannetti·Apr 14, 2026SaveLearn
The shadows and photon rings of two minimal deformations of Schwarzschild black holesThis paper primarily investigates the optical characteristics of two minimal Schwarzschild black hole deformations, the Kazakov-Solodukhin and Ghosh-Kumar black holes, under different accretion…Hong-Er Gong, Junlin Qin, Yusen Wang et al.·Apr 14, 2026SaveLearn
Post-Newtonian inspiral waveform model for eccentric precessing binaries with higher-order modes and matter effectsWe introduce pyEFPEHM, a post-Newtonian (PN) inspiral waveform model for eccentric and spin-precessing compact binaries that includes higher-order modes and matter effects. Accurate and efficient…Gonzalo Morras, Geraint Pratten, Patricia Schmidt et al.·Apr 13, 2026SaveLearn
Novel ringdown tests of general relativity with black hole greybody factorsWe present GreyRing, a new model for the post-merger signal in black-hole binary coalescences based on the greybody factor of the remnant. The model accurately reproduces the full frequency-domain…Romeo Felice Rosato, Francesco Crescimbeni, Sophia Yi et al.·Apr 13, 2026SaveLearn
Relativistic signatures of scalar dark matter in extreme-mass-ratio inspiralsWe study gravitational wave emission by circular extreme-mass-ratio systems in a spherically symmetric scalar environment. Previous studies have focused on the impact of scalar radiation channels,…Robrecht Keijzer, Simon Maenaut, Henri Inchauspé et al.·Apr 13, 2026SaveLearn
Ringing of rapidly rotating black holes in effective field theoryWithin the effective field theory approach to gravity, deviations from general relativity can be systematically described by higher-curvature operators. However, computing the resulting corrections…Tom van der Steen, Simon Maenaut, Stef J. B. Husken et al.·Apr 13, 2026SaveLearn
Gravitational wave signatures and periodic orbits of a charged black hole in a Hernquist dark matter haloIn this work, we study the motion of massive test particles and the gravitational--wave emission associated with periodic trajectories around a magnetically charged black hole immersed in a…N. Heidari, A. A. Araujo Filho, Iarley P. Lobo·Apr 13, 2026SaveLearn
Open-channel quantization of JT gravity at finite cutoffDirect canonical quantization of Jackiw--Teitelboim gravity at finite cutoff leads to a critically singular Pöschl--Teller problem whose endpoint admits inequivalent self-adjoint domains. We solve…Ye Zhou·Apr 13, 2026SaveLearn
Blueshift of light rays induced by gravitational wave memory effectThe article deals with photon propagation in pp-wave spacetimes in the strong gravitational-wave regime and its consequences for redshift measurements. We show that null geodesics crossing a…F. L. Carneiro, S. C. Ulhoa, J. W. Maluf·Apr 13, 2026SaveLearn
The balance problem for n aligned black holesAn intriguing open problem in general relativity is whether a stationary equilibrium configuration of multiple, physically relevant black holes can exist. In such a hypothetical setup, the…Jörg Hennig·Apr 13, 2026SaveLearn
Weakly turbulent dynamics on Schwarzschild-AdS black hole spacetimesIn the presence of confinement, small-data solutions to nonlinear dispersive equations can exhibit a gradual energy transfer from low to high frequencies, a mechanism driving the emergence of weakly…Christoph Kehle, Georgios Moschidis·Apr 13, 2026SaveLearn
Asymptotic Theorems and Averaging in Scalar Field CosmologyWe present a hybrid study that combines a concise review of scalar-field cosmology with new analytic developments that integrate averaging reductions for oscillatory regimes with dynamical-systems…Genly Leon, Aleksander Kozak, Claudio Michea·Apr 13, 2026SaveLearn