Collective excitations in quantum gravity condensatesA central open problem in quantum gravity is to understand how continuum spacetime emerges from quantum-geometric degrees of freedom in a background-independent setting. A many-body perspective…Andrea Calcinari, Adrià Delhom, Daniele Oriti·May 18, 2026SaveLearn
Vacuum, ma non troppo: hidden matter distribution in symmetry-transformed electrovacuum spacetimesWe analyse two static spacetimes, recently generated from a Schwarzschild--Bertotti--Robinson electrovacuum seed through distinct symmetry transformations. The electromagnetic field of the…Carlos A. R. Herdeiro, João P. A. Novo·May 18, 2026SaveLearn
Affine ANEC selects the closed FRW branch for geodesically complete cosmologyWe study the relation between geodesic completeness, the averaged null energy condition (ANEC), and spatial curvature in Friedmann--Robertson--Walker (FRW) cosmology within classical general…Nathan L. Burwig, Damien A. Easson·May 18, 2026SaveLearn
Quasinormal modes of Proca and Maxwell fields in d-dimensional Schwarzschild-AdS black holesProca and Maxwell fields in d-dimensional Schwarzschild black holes with anti-de Sitter (AdS) asymptotics are investigated through their linear perturbations and associated quasinormal modes (QNMs)…David C. Lopes, Tiago V. Fernandes, José P. S. Lemos·May 18, 2026SaveLearn
Scalar Field Reconstructions of Standard, Power Law and Logarithmic Holographic Dark Energy with a Gauss-Bonnet IR cut-offIn this paper, we investigate the Holographic Dark Energy (HDE) model and its entropy-corrected versions, namely the Power Law and Logarithmic entropy corrected HDE models, by considering the…Antonio Pasqua·May 18, 2026SaveLearn
Black hole mergers as probes of spacetime's condensed degrees of freedom?Black hole physics currently lacks a fully coherent understanding of the black hole mass (density), entropy, and interior (non-)singularity. These concepts are related to the black hole radius, area…Arno Keppens, Lester Kurvers·May 18, 2026SaveLearn
The spacetime Penrose inequality under a quasi final state hypothesisPenrose's original heuristic for his eponymous spacetime inequality -- a conjectured lower bound on the ADM mass in terms of the area of a horizon cross-section -- relies on the black hole final…Ahmed Ellithy·May 18, 2026SaveLearn
Emergent Thiemann coherent states in the near-kernel sector of quantum reduced loop gravityWe study the near-kernel sector of the Hamiltonian constraint operator in the one-vertex model of quantum reduced loop gravity using variational Monte Carlo methods with neural quantum states. The…Ilkka Mäkinen, Hanno Sahlmann, Waleed Sherif·May 18, 2026SaveLearn
Impact of sky localization uncertainty on ringdown inferenceAs gravitational-wave ringdown signals grow louder, quasinormal-mode inference depends increasingly on the treatment of extrinsic parameters. Standard analyses fix sky localization - and sometimes…Kallol Dey, Enrico Barausse, Marco Crisostomi et al.·May 18, 2026SaveLearn
Probing (sub-)solar-mass black holes and superspinars with current and next-generation gravitational-wave observatoriesGravitational-wave observations provide a powerful probe of compact objects and strong-field gravity. In this work, we investigate the detectability of binaries containing (sub-)solar-mass black…K. S. Sruthy, N. V. Krishnendu, Chandrachur Chakraborty et al.·May 18, 2026SaveLearn
Cosmological perturbations of TDiff fieldsWe study scalar field theories that break diffeomorphism invariance down to the subgroup of transverse diffeomorphisms through the matter sector in cosmological backgrounds. We focus on single- and…Antonio L. Maroto, Prado Martín-Moruno, Diego Tessainer·May 18, 2026SaveLearn
Dyonic Black Holes in Lorentz-Violating Gravity with a Background Kalb--Ramond FieldBy introducing a nonminimal coupling between the Kalb--Ramond field and the electromagnetic field, we construct an exact four-dimensional static, spherically symmetric dyonic black hole solution in…Yu-Xuan Lin, Jia-Zhou Liu, Yu-Xiao Liu·May 18, 2026SaveLearn
Quasinormal modes of a rotating loop quantum black holeWe investigate the quasinormal modes of a massless scalar field on an effective rotating loop quantum black hole background, constructed from a covariant spherical model via an improved Newman-Janis…Zhongzhinan Dong, Shulan Li, Dan Zhang et al.·May 18, 2026SaveLearn
Short-Range Tests of the Gravitational Inverse-Square LawExperimental constraints on the gravitational inverse-square law at short range are presented, employing a consistent formalism across a wide range of length scales. We provide comprehensive updates…Jiro Murata, Takuhiro Fujiie, Sae Suzuki·May 18, 2026SaveLearn
Kerr-like black holes shadow surrounded by dark matter halos: Comparison between various dark matter profilesThe study of shadows of static and rotating black holes immersed in various dark matter halo profiles has gained significant attention in recent years. In this paper, we consider the static black…Malihe Heydari-Fard, Mohaddese Heydari-Fard·May 18, 2026SaveLearn
Natural modification of quantum uncertainty, modified gravity, and cosmologyA common approach in physics and mathematics is to extend and modify theories and frameworks by considering what is often described as a `natural' extension or modification by including…Christian G. Boehmer, Eissa Al-Nasrallah·May 18, 2026SaveLearn
The Case for AstronsWe examine a proposed population of primordial, electrically charged compact objects, which we call astrons, with fiducial parameters \(MA1012M\), \(QA4×1032\,C\),…Claudio Corianò, Paul H. Frampton, Leonardo Torcellini·May 18, 2026SaveLearn
Effects of formation channels and gravitational lensing on stochastic gravitational wave backgroundTwo primary formation channels for black holes have been proposed: the astrophysical channel, driven by the collapse of massive stars, and the primordial channel, involving their direct formation…Xin-yi Lin, Zhengxiang Li·May 18, 2026SaveLearn
Slow-roll inflation in (dual) Kaniadakis cosmologyWe investigate slow-roll inflation within the framework of Kaniadakis and dual Kaniadakis cosmology, where the usual entropy formalism is generalized through a deformation parameter κ. By deriving…Leila Liravi, Ahmad Sheykhi·May 18, 2026SaveLearn
The problem of time: a path integral viewWe show that the emergence of time evolution in an otherwise timeless nonrelativistic closed quantum system -- viewed as a poor man's model of generally covariant quantum theory -- can be…Juan Manuel Diaz, Alejandro Perez·May 18, 2026SaveLearn
Rotating black holes with primary hair in five-dimensional generalized Proca theoryThis work presents a new class of exact analytic rotating black hole solutions within five-dimensional generalized Proca theories. Through a Kerr-Schild ansatz where the Proca field is set along a…Mokhtar Hassaine, Ulises Hernandez-Vera·May 18, 2026SaveLearn
Potential Space Symmetries in Ernst-like Formulations of Einstein-Maxwell/ModMax-Scalar field TheoriesWe complete the visible, hidden, sectorial, and discrete symmetries of Ernst-like potential spaces in stationary, axisymmetric Einstein-Maxwell-Scalar Field (EMSF) and Einstein-ModMax-Scalar Field…Leonel Bixano, Tonatiuh Matos·May 18, 2026SaveLearn
Testing the consistency of cosmological models with multimessenger astronomyWe show that within the framework of the Friedmann cosmological model it is possible to derive general multimessenger consistency conditions, between the gravitational wave (GW) and the…Antonio Enea Romano·May 18, 2026SaveLearn
Charged Black Holes in Quasi-Topological Gravity Coupled to Born-Infeld Nonlinear ElectrodynamicsWe construct static, spherically symmetric black hole solutions in quasi-topological gravity (QTG) coupled to Born-Infeld nonlinear electrodynamics. Starting from the spherically reduced action, we…Jose Pinedo Soto, Valeri P. Frolov·May 18, 2026SaveLearn
Photon Sphere for a Dilatonic Dyonic Black Hole in a Model with an Abelian Gauge Field and a Scalar FieldDilatonic dyon black hole solution with gravitational radius 2 μ and two charges Q1 and Q2 (electric and magnetic ones) in the gravitational 4d model with one scalar field and one 2-form is…V. D. Ivashchuk, U. S. Kayumov, A. N. Malybayev et al.·May 18, 2026SaveLearn