Computing spectral shifts for Johannsen-Psaltis black holesThe growing number of gravitational wave (GW) detections and the increasing sensitivity of GW detectors have enabled precision tests of General Relativity (GR) in the strong-field regime. The recent…David G. Wu, Asad Hussain, Aaron Zimmerman·Jun 2, 2026SaveLearn
Analogue gravity with Bose-Einstein condensatesAnalogue gravity explores how collective excitations in condensed matter systems can reproduce the behavior of fields in curved spacetimes. An important example is the acoustic black holes that can…Adrià Delhom, Luca Giacomelli·Jun 2, 2026SaveLearn
Quantum coherent dynamics of quasiclassical spacetimesIn a wide range of quantum gravity theories, quasiclassical geometries, which are solutions to the Einstein field equations approximately, are described by "coherent states." Here we propose…Sijia Wang, Achintya Sajeendran, Dong-han Yeom et al.·Jun 2, 2026SaveLearn
Gravitational radiation from Kerr black holes using the Sasaki-Nakamura formalism: Waveforms and fluxes at infinityIn linear perturbation theory for Kerr black holes, there are two equivalent formalisms, namely the Teukolsky and the Sasaki-Nakamura (SN) formalism. Typically, one defaults to the Teukolsky…Yucheng Yin, Rico K. L. Lo, Xian Chen·Jun 2, 2026SaveLearn
Semi-Analytic Trajectory Analysis of Light in Generic Static SpacetimesWe study a unified semi-analytical framework to study null geodesics and weak-field light deflection in generic static, spherically symmetric spacetimes of the form \(ds2 = -α(r,δ)\,dt2 +…Ali Övgün, Reggie C. Pantig·Jun 2, 2026SaveLearn
Black-hole hair from vector dark matter accretionWe model a single black hole in equilibrium with a dark photon-cold dark matter environment. Representing the dark photon as a Proca field, we show that a Schwarzschild black hole grows vector-field…Fredric Hancock, Helvi Witek·Jun 2, 2026SaveLearn
Rotating and non-linear magnetic-charged black hole with an anisotropic matter fieldWe present the solution of a non-linear magnetic-charged black hole with an anisotropic matter field and further extend it to obtain the corresponding rotating black hole solution using the modified…Qi-Quan Li, Yu Zhang, Hoernisa Iminniyaz·Jun 2, 2026SaveLearn
Gravitational Energy Creation in the Sandwich pp-Waves CollisionThis article investigates the spacetime of two colliding sandwich gravitational waves, focusing on evaluating gravitational energy before and after the collision. In the framework of the Teleparallel…F. L. Carneiro, K. Q. Abbasi·Jun 2, 2026SaveLearn
A regularized photon-pair geometry motivated by the ER=EPR conjectureWe regularize the Aichelburg-Sexl shock-wave geometry for massless particles by smearing the point-like source over a string-inspired length scale l0. A radial extension of the transverse geometry…Kimet Jusufi, Francisco S. N. Lobo, Douglas Singleton·Jun 1, 2026SaveLearn
Entropy Production and the Gravitational Origin of the Second LawWe investigate the relation between gravitational dynamics and the second law of thermodynamics in a non-equilibrium framework. Extending Jacobson's thermodynamic derivation of the Einstein…Simone Antonini, Antonino Marciano·Jun 1, 2026SaveLearn
Asymptotically-FLRW3 spacetimesWe introduce three-dimensional asymptotically-FLRW spacetimes as a simplified setting in which to study asymptotic symmetries and radiation in cosmology. Their asymptotic symmetry group is…Andrea Campoleoni, Arnaud Delfante, Marc Geiller et al.·Jun 1, 2026SaveLearn
Speed and accuracy for long signals: Frequency-domain effective-one-body waveforms for compact binary coalescencesGravitational-wave inference for long signals, like those from binary neutron-star (BNS) systems, requires waveform models that are both physically faithful and computationally efficient, otherwise,…Marcus Haberland, Alessandra Buonanno·Jun 1, 2026SaveLearn
Quark Stars in Ricci-Determinant Gravity with an Interacting Quark Equation of StateIn the present study, we explore the fundamental properties of static, spherically symmetric quark stars composed of quark matter with an interacting quark equation of state (EoS) within the…Loreany F. Araújo, Krishna Pada Das·Jun 1, 2026SaveLearn
Testing Exponential f(R) Gravity with CMB, DESI-DR2, and Supernova DataOne of the most popular competitors to the CDM paradigm as an explanation for the late-time acceleration of the universe is the modification of general relativity (GR), with models such as f(R)…Saurabh Verma, Archana Dixit, Anirudh Pradhan et al.·Jun 1, 2026SaveLearn
MCMC Constraints on Dyonic Kalb-Ramond Black Holes with a Cloud of Strings from Twin-Peak QPOs and EHT ShadowsWe study a dyonic black hole in a Lorentz-violating gravity that carries a background Kalb--Ramond field and is pierced by a cloud of strings. The resulting metric reduces to the recent Lin--Liu--Liu…Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı·Jun 1, 2026SaveLearn
Teleocosmology and quantum post-selectionAlthough cosmic acceleration is well established, its physical origin remains contentious. Most explanations invoke either a non-zero vacuum energy, i.e. a cosmological constant, or new fields. We…Paul C. W. Davies, João Magueijo·Jun 1, 2026SaveLearn
Dyonic Quark Stars in Quasi-Topological ElectromagnetismIn this paper we consider quark star solutions to Liu et al.'s Liu2019 quasi-topological electromagnetism (QTEM), a recently proposed form of dark energy. Since the QTEM contribution is…Michael Gammon, Nicola De Kock, Robert B. Mann et al.·Jun 1, 2026SaveLearn
Geometric Saturation of the Scale Function in Black-Bounce Spacetimes: Spherical, Planar, and Hyperbolic Transverse SectionsWe present a new construction for black-bounce spacetimes based on a deformation of the scale function that acts as a geometric saturation rather than introducing a prescribed constant minimal…Milko Estrada·Jun 1, 2026SaveLearn
Equivalence Principle violation in metric-affine gravity and finite-temperature effectsPossible violations of the equivalence principle are investigated within the framework of metric-affine gravity and their connection to finite-temperature effects are highlighted. Thermal corrections…Emmanuele Battista, Roberto Campagnola, Salvatore Capozziello et al.·Jun 1, 2026SaveLearn
Spectral suppression of black hole ringdown tailsThe late-time power law tail predicted by Price's law is a generic feature of black hole perturbation theory, yet it is largely absent in numerical relativity waveforms of binary black hole…Jose Antonio León Vega, Alejandro Svyatkovskyy Kholyavka, Sayak Datta et al.·Jun 1, 2026SaveLearn
Near-Horizon Deformation of Metric and the Black Hole InstabilityRecent time-domain analyses suggest that black hole stability may be sensitive to localized near-horizon geometric deformations, while the underlying spectral mechanism remains unclear. In this work,…Shi-Jie Ma, Zhan-Feng Mai, Run-Qiu Yang·Jun 1, 2026SaveLearn
COSMOS: A numerical relativity code specialized for PBH formationPrimordial black holes (PBHs) are black holes generated in the early universe without having gone through stellar evolution. In the standard formation process, PBHs are formed from super-horizon…Chul-Moon Yoo, Hirotada Okawa, Albert Escrivà et al.·Jun 1, 2026SaveLearn
3d Summation-by-Parts scheme for Linear Wave Equations on Hyperboloidal SlicesWe derive a fully 3-dimensional Summation-By-Parts scheme for a class of linear wave equations on hyperboloidal slices that meet future null infinity on a Minkowski background. The scheme is derived…Anuraag Reddy, Shalabh Gautam, Prayush Kumar·Jun 1, 2026SaveLearn
Stress-energy tensor of quantized scalar fields in thermal states on a zero-tidal wormholeThe construction of a static traversable wormhole requires exotic matter that satisfies the Morris-Thorne conditions. Quantum energy-momentum tensors have long been considered the most promising…Shun Jiang, Xiangdong Zhang·Jun 1, 2026SaveLearn
Effective dynamics of a homogeneous and isotropic universe with quantum curvatureWe consider the effective dynamics of a new, tentative model of a homogeneous and isotropic universe in loop quantum cosmology. The new model consists of modifying the standard Hamiltonian of loop…Ilkka Mäkinen·Jun 1, 2026SaveLearn