Mass inflation and thin shells in quasi-topological gravityWe study the null junction conditions in (re-summed) quasi-topological gravity theories, showing that no null thin shells exist within the realms of standard distributional theory for the pure…Francesco Di Filippo, David Kubiznak, Aravindhan Srinivasan·Apr 30, 2026SaveLearn
Regular ultracompact objects with anti-de Sitter cores as polymerized vacuum solutionsWe present a systematic derivation of regular black hole solutions -- and their horizonless counterparts -- that achieve regularization via an anti-de Sitter core. These geometries emerge as…Hongguang Liu, Ioannis Soranidis·Apr 30, 2026SaveLearn
The formalism of energy conservation during particle decay in the Kerr spacetimeWe derive a compact, covariant expression for the relative Lorentz factor of two particles in curved spacetime and apply it to particle decay in Kerr spacetime. This allows us to show that energy…Shurui Zhang, Remo Ruffini·Apr 30, 2026SaveLearn
Beyond the Separatrix: Analytic Continuation of Darwin Variables for Plunging Geodesics in Schwarzschild SpacetimeWe study geodesic motion of a test particle in Schwarzschild spacetime. Bound and scattering geodesics are commonly described using Darwin variables, which provide a convenient parametrization of the…Francisco M. Blanco·Apr 30, 2026SaveLearn
Probing mass inflation in polymerized vacuum regular black holes via colliding null shellsWe derive a class of inner-extremal regular black hole solutions characterized by a degenerate inner horizon. These geometries arise as polymerized vacuum configurations inspired by loop quantum…Hongguang Liu, Ioannis Soranidis·Apr 30, 2026SaveLearn
Spin-Induced Nonlinear Scalarization of Kerr Black Holes in Einstein-scalar-Gauss-Bonnet GravityWe investigate spin-induced scalarization of Kerr black holes in an Einstein-scalar-Gauss-Bonnet (EsGB) model that does not admit a linear tachyonic instability of the scalar-free solution. The…Meng-Yun Lai, Hyat Huang, Jutta Kunz et al.·Apr 30, 2026SaveLearn
Cosmological Tensions as Consistency Conditions for f(Q) GravityCosmology has entered a precision era in which discrepancies between independent datasets, most notably the H0 and S8 tensions, have become robust and statistically significant. These tensions…Amare Abebe·Apr 30, 2026SaveLearn
Gravitational wave constraints on the Paneitz operatorThe Paneitz operator is a dimension-4 conformally invariant fourth-order differential operator that has recently attracted attention for possible cancellations of the vacuum energy. We show that, in…Robin Valtin, Alexander Ganz, Guillem Domènech·Apr 30, 2026SaveLearn
The Quantum Noise Fraction and the addressable fraction in High-Frequency Gravitational Wave DetectionThe quantum noise fraction β -- the share of a detector's noise power that is quantum in origin -- bounds the sensitivity gain from any quantum technique at E=1/1-β.…Sergio Gaudio·Apr 29, 2026SaveLearn
Finite-Window Centered Organization of Neighboring PolesNear-degenerate resonance poles arise widely in open-wave systems. For gravitational-wave ringdowns, inference is performed on finite time windows where neighboring quasinormal modes can be…Yuye Wu, Hong-Bo Jin·Apr 29, 2026SaveLearn
Causal structure of black holes immersed in a Chaplygin-like dark fluid environment: Horizons and singularitiesIn the present work, we study the causal structure of spherically symmetric black holes immersed in a Chaplygin-like dark fluid, emphasizing the impact of the fluid parameters on curvature and…Rodrigo Dal Bosco Fontana, Jeferson de Oliveira·Apr 29, 2026SaveLearn
Agnostically decoding gravitational wave model deficiencies in GWTC-3Gravitational Wave (GW) data bring an exceptional avenue to test the underlying models of coalescing compact objects. In the regime of strong gravity and high curvature, they allow the exploration of…Guillaume Dideron, Suvodip Mukherjee, Luis Lehner·Apr 29, 2026SaveLearn
The Hawking Singularity Theorem for Hölder Continuous Metrics with Lp-Bounded CurvatureWe prove a low-regularity version of Hawking's singularity theorem for Lorentzian metrics in W1,p with Riemann curvature in Lp, where p>2n and n the dimension of spacetime. This…Michael Kunzinger, Moritz Reintjes, Roland Steinbauer et al.·Apr 29, 2026SaveLearn
Power-Law Approach of the Stress-Energy Tensor to the Unruh State after Gravitational CollapseWe establish the rate at which the renormalized stress--energy tensor of a massless minimally coupled scalar field in the in-vacuum state of a collapsing null-shell spacetime approaches the…Michael Wilson·Apr 29, 2026SaveLearn
Thermodynamic properties of the Kerr Black-hole in non-linear electrodynamics with cosmological constantWe study thermodynamic properties, in particular the Temperature~(T), Angular velocity~(Ωh) and Entropy~(S) of the of magnetically charged slowly rotating (with rotation parameter a 0.10)…Vinayak S. Pawar, Siba Prasad Das·Apr 29, 2026SaveLearn
Quantum Probe to the Higher Dimensional Yang-Mills SingularityWe investigate the quantum nature of naked curvature singularities in Einstein-Yang-Mills (EYM) theory using the Horowitz-Marolf (HM) criterion, which assesses quantum singularities via the evolution…M. Mangut, O. Gurtug, M. Halilsoy·Apr 29, 2026SaveLearn
Trapping, Irregular Waveforms, and Efficient Radiation in Ultra-relativistic Black Hole EncountersWe demonstrate that ultra-relativistic black hole encounters reveal a new regime of the two-body interaction in general relativity. Evolving equal-mass, nonspinning black holes with initial…Hengrui Zhu, Frans Pretorius, James M. Stone·Apr 29, 2026SaveLearn
Large-Eccentricity Asymptotics and Fast Analytic Approximation for Fourier modes of Post-Newtonian Eccentric WaveformsIn this work, we develop analytic asymptotic methods for computing the Fourier modes of gravitational waves from post-Newtonian binary systems in the quasi-Keplerian parametrization in the high…Xiaolin Liu, Zhoujian Cao·Apr 28, 2026SaveLearn
Inflation driven by repulsive-like primordial black holesWe review a new natural inflationary mechanism operated by repulsive-like primordial black holes (PBHs). In particular, working within the ``Swiss - Cheese" cosmological framework, we find that a…Konstantinos Dialektopoulos, Theodoros Papanikolaou, Vasilios Zarikas·Apr 28, 2026SaveLearn
Topology of black hole thermodynamics: A brief reviewRecent explorations of topological aspects in black hole thermodynamics have achieved unprecedented progress. By utilizing topological numbers, different black hole systems can be categorized into…Shao-Wen Wei, Yu-Xiao Liu·Apr 28, 2026SaveLearn
Scattering of electromagnetic field in quasi-topological gravityWe investigate the absorption cross sections of electromagnetic perturbations propagating on a four-dimensional brane in the background of higher-dimensional regular black holes arising in…Juan Pablo Arbelaez·Apr 28, 2026SaveLearn
Inflationary Scenarios in f(Q,ϕ) Gravity with Scalar Field CouplingIn this work, we investigated several inflationary scenarios within the framework of modified f(Q,ϕ) gravity with a nonminimal coupling between the scalar field and the nonmetricity scalar. We…F. Mavoa, M. B. Barry, R. Ndioukane et al.·Apr 28, 2026SaveLearn
The Equivalence Principle and Kinematical Structure in the ADM FrameworkThe relation between uniformly accelerated laboratories and laboratories supported in a gravitational field lies at the conceptual core of the Equivalence Principle, yet its precise kinematical…L. G. Pereira·Apr 28, 2026SaveLearn
Mean first passage time and the Kramers escape rate of phase transitions for the Bardeen-AdS-class black holeIn this study, by utilizing the constructed generalized free energy alongside the Mean First-Passage Time and the Kramers escape rate from stochastic dynamics, we have obtained a comprehensive…Chen Ma, Bin Wu, Zhen-Ming Xu·Apr 28, 2026SaveLearn
Thermodynamic and Radiative Properties of Euler-Heisenberg AdS Black Holes Surrounded by Quintessence and Dark Matter with a Cloud of StringsWe investigate the thermodynamics, criticality, and selected radiative and optical properties of an Euler-Heisenberg AdS black hole surrounded by quintessence, perfect fluid dark matter, and a cloud…Faizuddin Ahmed, Edilberto O. Silva·Apr 28, 2026SaveLearn