Localized formation of quiescent big bang singularitiesWe prove a localized big bang formation result, which does not require proximity of the initial data to any background solution. Suppose that we are given initial data for the Einstein--nonlinear…Andrés Franco-Grisales·Apr 2, 2026SaveLearn
Asymptotic Symmetries of the Holst Action at Spatial Infinity: Including SupertranslationsWe investigate the asymptotic symmetries of General Relativity at spatial infinity within the first-order formalism described by the Holst action. Employing the covariant phase space method, we…Sepideh Bakhoda, Hongguang Liu·Apr 2, 2026SaveLearn
Case studies with GPBilby of glitch-contaminated transient gravitational wavesIn their fourth observing run, the LIGO--Virgo--KAGRA gravitational-wave observatories have found hundreds of new signals, but many are contaminated by non-Gaussian transient noise artefacts known as…Mattia Emma, Ann-Kristin Malz, Adriana Dias et al.·Apr 2, 2026SaveLearn
Mitigation of Incoherent Spectral Lines via Adaptive Coherence Analysis for Continuous Gravitational-Wave SearchesThe sensitivity of continuous gravitational-wave searches is strictly limited by non-Gaussian spectral artefacts that accumulate coherent power over long observation baselines. In this paper, we…Ye Zhou, Karl Wette·Apr 2, 2026SaveLearn
Radial fall: the gravitational waveform up to the second-and-half Post-Newtonian orderWe consider an application of the Multipolar Post Minkowskian formalism to the case of a two-body system in radial fall. We compute, within the post-Newtonian approximation, the associated…Donato Bini, Giorgio Di Russo·Apr 2, 2026SaveLearn
Geometric origin of the cosmological constant from Einstein-Chern-Simons gravity compactified to four dimensionsWe present a model in which the cosmological constant emerges as a purely geometric effect from the four-dimensional compactification of five-dimensional Einstein-Chern-Simons gravity. The…M. Cataldo, S. Lepe, C. Riquelme et al.·Apr 2, 2026SaveLearn
Searches for Continuous Gravitational Waves from Supernova Remnants in the first part of the LIGO-Virgo-KAGRA Fourth Observing runWe present results from directed searches for continuous gravitational waves from a sample of 15 nearby supernova remnants, likely hosting young neutron star candidates, using data from the first…The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration et al.·Apr 2, 2026SaveLearn
High-frequency gravitational wave transients from superradianceUltralight bosons can form macroscopic gravitational-atom clouds around rotating black holes via superradiance, sourcing quasi-monochromatic gravitational waves through level transitions and…Henry Su, Lucas Brown, Christopher Ewasiuk et al.·Apr 1, 2026SaveLearn
Asymptotic analysis of the "simulated horizon" segment of the Collins spiralThe Tolman-Oppenheimer-Volkoff (TOV) equations for a massless fluid take the form of a pair of coupled autonomous first order differential equations, which can be employed in a model for a…Stephen L. Adler·Apr 1, 2026SaveLearn
Expanding Our Horizons: Rethinking Gravity's Role in the Quantum-to-Classical TransitionThe origin of cosmic structure is widely regarded as quantum, yet the Universe today appears classical. Standard lore attributes this to a "quantum-to-classical" transition on super-horizon…Aurora Ireland·Apr 1, 2026SaveLearn
Phase transition for a black hole with matter fields and the relation with the Lyapunov exponentWe construct static black hole solutions coexisting with anisotropic matter in asymptotically (anti-)de Sitter spacetime and investigate how the matter field modifies their thermodynamic and…Pakhlavon Yovkochev, Bobomurat J. Ahmedov, Bum-Hoon Lee et al.·Apr 1, 2026SaveLearn
Comment on "Quantum phase transitions of Dirac particles in a magnetized rotating curved background: Interplay of geometry, magnetization, and thermodynamics"In this comment, we obtain the complete energy spectra for the paper by Sahan et al. [1], that is, the energy spectra dependent on two quantum numbers, namely, the radial quantum number (given by…R. R. S. Oliveira·Apr 1, 2026SaveLearn
Corrected Hawking Temperature and Final State of Black Hole Evaporation Under GEVAG FrameworkIn the GEVAG (Generalized Entropy Varying-G) framework, any generalization to horizon entropy leads to a varying gravitational "constant" Geff that is a function the horizon area.…Yen Chin Ong·Apr 1, 2026SaveLearn
A framework for creating galaxy models in the geometry of the conservation group with dark matter halos and flat rotation curvesPandres has developed a theory which extends the geometrical structure of a real four-dimensional space-time via a field of orthonormal tetrads with an enlarged covariance group. This new group,…Edward Lee Green·Apr 1, 2026SaveLearn
Plummer Dark Matter Black Hole with Topological Defects: Shadow, Greybody Factors, Quasinormal Modes, and ThermodynamicsWe construct a static, spherically symmetric black hole (BH) solution embedded in a cored Plummer dark matter (DM) halo and a Letelier cloud of strings (CoS). Starting from the Plummer-Schwarzschild…Ahmad Al-Badawi, Faizuddin Ahmed, İzzet Sakallı·Apr 1, 2026SaveLearn
Minimal Length Effects on Keplerian Scattering and Gravitational LensingWe study the impact of a minimal length, implied by generalized uncertainty principles and quantum gravity models, on unbounded (scattering) trajectories in the Kepler problem. The analysis is based…Mykola Samar, Mariia Seniak·Apr 1, 2026SaveLearn
Cosmology from asymptotically safe Proca theoriesEffective field theories for cosmology offer a powerful framework to investigate the dynamics of space--time and address longstanding open puzzles. In this work, we initiate a programme to analyse…Carlos Pastor-Marcos, Lavinia Heisenberg, Álvaro Pastor-Gutiérrez et al.·Apr 1, 2026SaveLearn
Thermodynamics, Shadow, and Quasinormal Modes of AdS Ayón--Beato--García Massive Black HoleWe investigate the thermodynamics, photon sphere, and dynamical stability of an AdS Ayón--Beato--García (ABG) massive black hole with graviton mass and magnetic charge. The Gibbs free energy exhibits…Dharm Veer Singh, Sudhaker Upadhyay, Amit Kumar et al.·Apr 1, 2026SaveLearn
Nonlinearities in Gravity: Gravitational Wave RingdownThe modeling of gravitational wave ringdown has traditionally relied on linear perturbation theory, which mainly describes the late-time behavior of a perturbed black hole after a binary merger.…Macarena Lagos·Apr 1, 2026SaveLearn
Stability analysis and double critical phenomenon in the Einstein-Maxwell-scalar theoryWe investigate the dynamical stability and phase transition behavior in a holographic superfluid model incorporating higher-order self-interaction terms λ|ψ|4, τ|ψ|6, and a non-minimal coupling…Zi-Qiang Zhao, Mei-Ling Yan, Zhang-Yu Nie et al.·Apr 1, 2026SaveLearn
Charged Black Holes in Bumblebee gravity with Global Monopole: Thermodynamics and ShadowIn this paper, we perform a detailed study of the thermodynamic properties of a charged black hole in bumblebee gravity in the presence of a global monopole. We also analyze the optical…Faizuddin Ahmed, Shubham Kala, Edilberto O. Silva·Apr 1, 2026SaveLearn
Survival of nonclassical correlations in Lorentz-violating spacetimeThe breakdown of Lorentz invariance, a potential signature of quantum gravity, offers a window into physics beyond general relativity. We investigate how such a violation, embodied by the…Yangchun Tang, Zhilong Liu, Wentao Liu et al.·Apr 1, 2026SaveLearn
Quantum Oppenheimer-Snyder primordial black holes as all the dark matterPrimordial black holes (PBHs) are widely considered as candidates for dark matter in many recent studies, and they are often modeled as Schwarzschild or Kerr black holes (BHs), which have curvature…Li-Shuai Wang, Xiangdong Zhang·Apr 1, 2026SaveLearn
The scalar--Maxwell--Λ(x) system: Wormhole spacetimes without nonlinear electrodynamics in unimodular gravityIn General Relativity, supporting known traversable wormhole geometries with electromagnetic fields typically requires complex Non-Linear Electrodynamics (NED). We demonstrate that Unimodular Gravity…G. Alencar, T. M. Crispim·Mar 31, 2026SaveLearn
Regular Black Strings and (2+1) Black Hole in Unimodular Gravity Supported by Maxwell FieldsIn this work, we obtain regular solutions with a dynamical cosmological function in unimodular gravity. This alternative theory to General Relativity imposes an additional condition on the spacetime…G. Alencar, V. H. U. Borralho·Mar 31, 2026SaveLearn