Superradiant Bose--Einstein condensates around Kerr black holesUltralight bosonic dark matter can accumulate around a rotating black hole, where superradiance amplifies the field until a macroscopic cloud forms. Whether such a cloud behaves as a Bose--Einstein…Sen Guo, Lin Wen, Xiao-Xiong Zeng·Aug 3, 2026SaveLearn
A Time-Dependent Canonical Transformation between Bateman and Doubled Caldirola--Kanai Systems for a Homogeneous Massive Scalar Field on a Prescribed FLRW BackgroundDissipative equations admit distinct variational descriptions in the Bateman and Caldirola--Kanai (CK) formalisms. The classical correspondence between them is extended to a homogeneous canonical…Narakorn Kaewkhao, Chaiyaphat Phantusen·Aug 3, 2026SaveLearn
Analytically Approximate Black Hole Solution to Higher Curvature GravityHigher-curvature gravity usually leads to very complicated field equations, which makes it hard to find analytical solutions. In this work, we obtain analytical charged black hole solutions in…Seyed Naseh Sajadi·Aug 3, 2026SaveLearn
The first law of black hole mechanics in conformal Einstein-Power-Yang-Mills theoryIn the framework of the Iyer-Wald formalism, the first law of black hole mechanics is examined within the context of conformal Einstein-power-Yang-Mills (CEPYM) theory. By comparing two…Xiaokai He, Xiaoning Wu, Naqing Xie·Aug 3, 2026SaveLearn
A Quantum Dominant Energy ConditionWe propose a quantum dominant energy condition (QDEC) for the stress tensor in the context of quantum field theory in curved spacetimes. A rigorous proof is given for the case of Rindler wedges, and…Stefan Hollands, Roberto Longo, Gerardo Morsella·Aug 3, 2026SaveLearn
Cosmological dynamics based on Lovelock's gravity. Qualitative analysisWe perform a complete qualitative analysis of the cosmological dynamics of Lovelock gravity in a spatially flat Friedmann-Robertson-Walker (FRW) universe filled with a perfect fluid obeying a…Aleksei V. Nikolaev, Victor M. Zhuravlev, Sergei V. Chervon·Aug 3, 2026SaveLearn
Effects of the inflaton mass on the pre-inflationary dynamics and primordial power spectra in loop quantum cosmologyConsidering the mass parameters as free phenomenological parameters, we investigate inflation driven by a canonical scalar field with different potentials in LQC. We find that a smaller mass value…Kui Xiao, Abolhassan Mohammadi, Hongwei Tan·Aug 3, 2026SaveLearn
From gravastar to central singularityWe consider the model of the regular black hole, which demonstrates that the gravastar is thermodynamically unstable towards the Schwarzschild black hole with singularity.G. E. Volovik·Aug 3, 2026SaveLearn
Horizon-redshift transfer in black-hole direct-wave dampingDirect waves from black-hole mergers may probe horizon dynamics, but their observed envelopes need not decay at the Kerr surface-gravity rate. We compute the complex-frequency spin--2, =m=2…Wen-Biao Han, Ye Jiang·Aug 3, 2026SaveLearn
Nonlinear stability of subextremal Kerr black holesWe settle the global nonlinear stability problem for the family of Kerr black holes in the full subextremal range: spacetimes evolving from initial data close to those of a subextremal Kerr black…Peter Hintz·Aug 3, 2026SaveLearn
Beyond Plane Waves: Coherent Network Response to Collimated Gravitational-Wave WavepacketsWe present a paraxial wavepacket model for structured, collimated gravitational-wave bursts and derive the coherent response of detector networks to these signals. For current terrestrial baselines…S. D. Campos·Aug 3, 2026SaveLearn
Cosmological perturbations in the theory of gravity with non-minimal derivative coupling. I. Modes of perturbationsWe consider perturbations in the isotropic and homogeneous cosmological model with the spatially flat Friedmann-Lemaitre-Robertson-Walker metric in the framework of the theory of gravity with…R. I. Kamalitdinov, S. V. Sushkov·Aug 3, 2026SaveLearn
Long-lived quasinormal frequencies for regular black hole supported by the Einasto profile in the presence of the magnetic fieldWe investigate quasinormal modes, grey-body factors, and absorption cross-sections of a massive scalar field in regular black-hole spacetimes supported by the Einasto density profile. The analysis is…Milena Skvortsova·Aug 3, 2026SaveLearn
Fixing the center-of-mass frame of numerical relativity waveforms using the post-Newtonian center-of-mass chargeThe Bondi--van der Burg--Metzner--Sachs (BMS) frame of gravitational waves produced by numerical relativity (NR) simulations is crucial for building accurate waveform models. A proper comparison of…Aniket Khairnar, Leo C. Stein, Michael Boyle et al.·Aug 3, 2026SaveLearn
Causal Structure for Generalized SpinfoamsWe investigate the role of causality in the generalized EPRL spinfoam model introduced by Kaminski, Kisielowski, and Lewandowski (EPRL-KKL). We first propose a definition of causal structure on an…Carlos E. Beltrán·Aug 3, 2026SaveLearn
Black Hole Gravitational Phenomena in Higher-Order Curvature-Scalar GravityThis work aims to explore the gravitational consequences of a recently proposed black hole solution presented in the literature [Phys. Dark Univ. 50 (2025) 102061]. We initiate our analyzes by taking…A. A. Araújo Filho, N. Heidari, Iarley P. Lobo·Aug 3, 2026SaveLearn
Higher-curvature corrections and the endpoint of black hole evaporation in gravitational effective field theoryThe endpoint of black hole evaporation remains uncertain once the semiclassical description approaches the Planck scale. In this work we study late-stage evaporation within four-dimensional…Lorens F. Niehof, Sjors Heefer, Andrea Fuster et al.·Aug 3, 2026SaveLearn
Fully global numerical evolutions of the linearised spin-2 equationWe study the linearised spin-2 field on conformally compactified Minkowski spacetime. Initial data are prescribed on past null infinity I-, and the system is evolved through the cylinder…Merlyn Barrer, Jörg Frauendiener, Jörg Hennig et al.·Aug 2, 2026SaveLearn
How does nonmetricity shape quantum emission from rotating bumblebee black holes?We investigate how nonmetricity affects particle creation and evaporation in rotating bumblebee black holes by comparing metric and metric-affine solutions. We normalize the stationary Killing…A. A. Araújo Filho·Aug 2, 2026SaveLearn
A geometrical-optics analogy for gravitational lensing using axicon-type lensesGravitational lensing is often introduced through the bending of light by mass, but its geometrical nature can be difficult to visualize without invoking the full machinery of general relativity. We…Santiago Hernández-Díaz, Ángel S. Sanz·Aug 2, 2026SaveLearn
Quasinormal modes response to thermodynamic phase transitions in the charged AdS black hole surrounded by perfect fluid dark matterWe investigate how thermodynamic phase transitions are reflected in the quasinormal modes (QNMs) of charged anti-de Sitter (AdS) black holes surrounded by perfect fluid dark matter (PFDM). In the…Long-Xiang Li, Zhong-Wen Feng·Aug 2, 2026SaveLearn
From Quantum Correlations to Inflationary Tracking Scalar Field EvolutionThe tracking condition ϕ2=γH-m for single scalar field theory leads to analytic inflationary solutions, which are compatible with the current cosmic microwave background radiation…V. K. Oikonomou·Aug 2, 2026SaveLearn
Kerr-NUT Thermodynamics: Misner Strings and Nut ChargesUsing the thermodynamic approach introduced in e-Print: 2206.09124 [hep-th] to the case of Kerr-NUT solution, we demonstrate the existence of a new conserved quantity that is dual to the angular…Mohamed Tharwat, Adel Awad·Aug 2, 2026SaveLearn
New constraints on modified gravity with dimension-six operators from gravitational wavesThe present article deals with gravitational-wave propagation affected by higher-derivative terms that break spacetime symmetries. Two dimension-6 contributions of the gravitational Standard-Model…Justo López-Sarrión, Carlos M. Reyes, César Riquelme et al.·Aug 2, 2026SaveLearn
Optimal frequency scales for probing black-hole geometriesCan gravitational waves probe the near-horizon geometry of black holes, and if yes, which frequency scale is optimal? Although shorter wavelengths usually resolve smaller scales, we show that…Saulo Albuquerque, Sebastian H. Völkel·Aug 2, 2026SaveLearn