Regular black holes from dynamical-tension string hedgehogsA spherical cloud of radial strings with non-zero constant tension has an energy density proportional to r-2 and therefore produces a singular conical geometry rather than an asymptotically flat…Sebastian Bahamonde, Eduardo I. Guendelman·Sep 5, 2026SaveLearn
A principal-symbol obstruction in metric-affine Gauss--Bonnet gravityThe four-dimensional Riemannian Gauss--Bonnet combination admits more than one continuation to a geometry with an independent affine connection. Two natural candidates, the metric-contracted…Hamed Bouzari Nezhad·Sep 5, 2026SaveLearn
Physics-based phenomenological modeling of binary black hole hierarchical formation 1: Synthetic universes from globular cluster simulations for GWTCWe iteratively model the GWTC-5.0 binary-black-hole census with three components. First, a physically normalized population from Rapster globular-cluster simulations spans cluster mass, metallicity,…R. O'Shaughnessy, R. Mechum, M. Qazalbash et al.·Sep 5, 2026SaveLearn
Slow rotation of a localized Kalb-Ramond wormhole: Wald charges and fractional quadrupolar hairWe construct an action-consistent slow-rotation branch, through second order, for a traversable wormhole supported by a phantom scalar, a scalar-localized radial string sector, and a Kalb-Ramond…Sardor Murodov·Sep 5, 2026SaveLearn
Thin accretion disk and gravitational capture cross sections of a quantum Oppenheimer--Snyder black hole immersed in an external magnetic fieldWe study a geometrically thin, optically thick Novikov--Thorne accretion disk and the gravitational capture cross sections of a quantum Oppenheimer--Snyder black hole immersed in an external,…Anuar Idrissov, Hernando Quevedo·Sep 5, 2026SaveLearn
Self-supervised reconstruction of transients in data from space-borne gravitational-wave detectorsSpace-based gravitational-wave (GW) data may contain transient signals whose waveform morphologies are not known in advance. Extracting these signals is important for characterizing new sources and…Yuxiang Xu, Minghui Du, Bo Liang et al.·Sep 5, 2026SaveLearn
Initial conditions for inflationWe propose a single-field mechanism that dynamically prepares the initial conditions required for exponential plateau inflation. The inflaton is decomposed into a coarse-grained mode and a…Gerasimos Kouniatalis·Sep 4, 2026SaveLearn
Fermionic Casimir memory from an anisotropic gravitational pulseWe investigate the late-time energy deposited by a weak, spatially homogeneous anisotropic gravitational pulse in a massless Dirac field confined between two static parallel plates. The field…Celio R. Muniz, Herondy F. Santana Mota·Sep 4, 2026SaveLearn
Effective Field Theory of Gravity in Relativistic MediaWe develop an effective field theory of gravity in relativistic media. Integrating out the medium leaves vacuum gravity with updated Feynman rules: a graviton propagator dressed by the stress-energy…Beka Modrekiladze·Sep 4, 2026SaveLearn
A compact time-frequency representation for gravitational-wave data analysisTime-frequency (wavelet) domain analyses are seeing greater use for gravitational-wave data analysis due to the advantages they have in handling non-stationary noise. A popular choice is the…Noah Pearson, Mesut Çalışkan, Sophie Bini et al.·Sep 4, 2026SaveLearn
End state of the experimental black-hole bombRotating black holes can amplify incident waves through superradiant scattering. When these waves are confined, repeated amplification gives rise to the black-hole bomb instability, whose nonlinear…Patrik Švančara, Leonardo Solidoro, Pietro Smaniotto et al.·Sep 4, 2026SaveLearn
Nonlinear evolution in Galileon EFTs: Regularization and screeningIn a scalar effective field theory (EFT) with Galileon symmetry, we distinguish the strong-field expansion from the derivative expansion and study spherically symmetric classical nonlinear dynamics.…Farid Thaalba, Aaron Held, Ramiro Cayuso et al.·Sep 4, 2026SaveLearn
Fast Bayesian Inference for Long-Duration Gravitational-Wave Signals in 3G detectorsThird-generation (3G) gravitational-wave detectors will observe binary-neutron-star inspirals for nearly a day, so Earth's rotation becomes part of the signal rather than a negligible correction.…Anand S. Sengupta·Sep 4, 2026SaveLearn
Cosmological Evolution of the Randall-Sundrum II Model with Running Vacuum: A Special Class of SolutionsIn this work, we construct a novel cosmological framework by integrating the running vacuum model into the Randall-Sundrum II braneworld scenario. We derive a special class of analytical solutions in…Hao Yu, Jin Li, Zi-Chao Lin·Sep 4, 2026SaveLearn
Spherically symmetric inextendibility of weak null singularities with Christoffel symbols in LslocMotivated by the strong cosmic censorship conjecture in general relativity, we prove the inextendibility of spherically symmetric weak null singularities as spherically symmetric Lorentzian manifolds…Peter Cameron, Jan Sbierski·Sep 4, 2026SaveLearn
Probing Neutron Star Equation of State Universality with Gravitational WavesCurrent neutron star equation-of-state inferences assume that a common equation of state describes all neutron stars. However, poorly understood dense-matter physics may give rise to distinct…Praveer Tiwari, Ajit Kumar Mehta, K. G. Arun·Sep 4, 2026SaveLearn
Probing Dark Matter with Strongly Lensed Binary Black Hole Mergers: Prospects in the Near FutureGravitational-wave~(GW) transients, strongly lensed by intervening galaxies and clusters, are expected to constitute a small fraction ( 0.1-0.5\%) of the events detectable by ground-based…Koustav N. Maity, Souvik Jana, Ankur Barsode et al.·Sep 4, 2026SaveLearn
Static Spherically Symmetric Solutions in Modified Entropic GravityWithin the entropic gravity paradigm introduced by Verlinde, one assumes that the microscopic degrees of freedom residing on the holographic screen obey the equipartition law of energy. Nevertheless,…A. Rostami, M. Rostampour, A. Yarahmadi et al.·Sep 4, 2026SaveLearn
Probing magnetic fields of compact objects with continuous gravitational wavesSpinning, deformed compact objects such as neutron stars are canonical sources of continuous gravitational waves. These objects may be born with magnetic fields that can strongly influence their spin…Gopalkrishna Prabhu, Aditya Kumar Sharma, R. Prasad et al.·Sep 4, 2026SaveLearn
Dirac fields in LRS III spacetimes: a dynamical systems analysisWithin the 1+1+2 covariant formalism, we investigate Locally Rotationally Symmetric (LRS) class III spacetimes sourced by a self-gravitating Dirac field expressed in polar form. By recasting the…Fabrizio Esposito, Sante Carloni, Stefano Vignolo·Sep 4, 2026SaveLearn
Naked Singularities beyond Spherical Symmetry: Instability of κ-Self-Similar Solutions via an Iteration SchemeThis paper provides the instability counterpart to our recent construction of nonspherically symmetric approximating κ-self-similar naked-singularity solutions for the Einstein--scalar field…Xinliang An, Shengrong Wu·Sep 4, 2026SaveLearn
Inverse Reconstruction of Causal Nonlinear Electrodynamics: Functional Families, Spectral Constraints, and Single-Horizon Black HolesNonlinear electrodynamics (NLED) admits many causal theories, so causality alone does not provide a unique selection principle. We formulate an inverse construction in which constitutive…Ariel Guzmán, Mohsen Fathi, J. R. Villanueva·Sep 3, 2026SaveLearn
Constraints on Scalar--Tensor--Vector Gravity Theory Parameters Inferred from Quasiperiodic OscillationsWe study circular geodesics of neutral test particles in the static charged solution of Scalar--Tensor--Vector Gravity (STVG), and we use the twin kilohertz quasiperiodic oscillations (QPOs) of…Marco Muccino, Kuantay Boshkayev, Binay Prakash Akhouri et al.·Sep 3, 2026SaveLearn
Entropy Obstruction to Closed Semiclassical BouncesWe prove a finite-G singularity theorem for semiclassical spacetimes with compact Cauchy slices. Let a compact Cauchy slice be divided by a compact surface into regions B and C. Suppose…Naman Kumar·Sep 3, 2026SaveLearn
The Einstein Tensor from UV-regulated Field CorrelationsIt is known that the spacetime metric can be recovered from quantum-field correlators. We extend this programme by showing that the Einstein tensor can be directly written in terms of UV-regulated…Matheus H. Zambianco, Achim Kempf·Sep 3, 2026SaveLearn