On the Emergence of the Hysteresis Effect in Gravitational SystemsPreviously, it was shown that the interplay between the gravitational memory effect and the thermodynamics of an ensemble of spinning objects gives rise to a hysteresis effect, which can be termed…Raihaneh Moti, Ali Shojai·Aug 21, 2026SaveLearn
Black hole apparent horizons become comoving with the universeIt has been shown that static black hole event horizons cannot exist in time-dependent backgrounds without becoming naked singularities. In light of this, we are left with the question ``how does a…Valerio Faraoni, Massimiliano Rinaldi·Aug 21, 2026SaveLearn
Scalar dark matter in space-based gravitational-wave detectors: center-of-mass motion, size breathing, and TDI projectionUltralight scalar dark matter can make space-based gravitational-wave detectors respond through both the scalar charge of freely falling test masses and scalar-induced changes of local solid length…Rui-Yang Hu, Yuan-Zhi Li, An-Qi Wang et al.·Aug 21, 2026SaveLearn
Mannheim--Kazanas Black Holes: Horizons, Temperatures and ThermodynamicsStatic black holes in conformal Weyl gravity differ from their Einstein counterparts in a simple but important way: the Mannheim--Kazanas geometry is encoded in a Bach-flat lapse function whose…Bekir Can Lütfüoğlu·Aug 21, 2026SaveLearn
Optical-area minimum method for static spherical black hole shadowsWe formulate a global optical-area method for shadows of static, spherically symmetric black holes. For the metric \(ds2=-A(r)dt2+B(r)dr2+C(r)dΩ2\), spherical sections of the optical…Vitalii Vertogradov, Nikko John Leo S. Lobos, Ali Ovgun et al.·Aug 21, 2026SaveLearn
Cosmological Reconstruction in f(Q, T) Gravity: ΛCDM Background and Matter-Sector DependenceIn this work, we investigate the cosmological reconstruction of f(Q, T) gravity, where Q is the non-metricity scalar and T is the trace of the energy-momentum tensor. We consider the functional…Shivank Pal, Gauree Shanker·Aug 21, 2026SaveLearn
Conformal flatness selects a universal isothermal attractor in pure Lovelock gravityWe determine the complete solution set of the conformally flat isotropic pure Lovelock field equations for every order N2 and every admissible dimension d2N+1. Conformal flatness and…Sudan Hansraj·Aug 21, 2026SaveLearn
General relativistic three-body problemWe examine analytically the restricted 3-body problem in general relativity for a set of extremally charged black holes. We apply the method of Ferrell and Eardley, which consists in perturbing the…Eliška Klimešová, Martin Žofka·Aug 21, 2026SaveLearn
Nonlocal correlation in quantum network under relativistic motionWe investigate the relativistic dynamics of network nonlocality in general n-local networks with chain and star topologies using the Unruh-DeWitt detector model. We show that the relativistic…Si-Han Li, Tian-Yang Wang, Ai-Yan Tong et al.·Aug 21, 2026SaveLearn
Bayesian P-spline recovery of stochastic gravitational-wave backgrounds in LISAThe detection of a stochastic gravitational-wave background (SGWB) is a primary science objective for the Laser Interferometer Space Antenna (LISA). However, extracting these signals is difficult…Nazeela Aimen, Patricio Maturana-Russel, Avi Vajpeyi et al.·Aug 21, 2026SaveLearn
Causal Gravitational-Wave Production Does Not Generate Infrared Adiabatic CurvatureShort tensor modes can generate a white noise contribution to the local scalar K=8πGρ/3-θ2/9, but this does not induce an infrared-enhanced adiabatic curvature spectrum. For a conserved causal…Ruth Durrer, Alessandro Melchiorri·Aug 20, 2026SaveLearn
Perturbative vacuum constraints in higher-curvature gravity: Schwarzschild deformations and strong-field observablesHigher-curvature terms modify the action but do not necessarily generate new vacuum geometries on the branch perturbatively connected to GR. We develop a first-order framework for static, spherical…Gustavo Melgarejo, Daniel Molano, Jonathan Ramírez·Aug 20, 2026SaveLearn
Spinning test particles in a weak gravitational wave and the memory effectIn this work, we investigate the worldline deviation of spinning test particles in a weak gravitational wave (GW) spacetime. Within the pole-dipole approximation and the Tulczyjew spin supplementary…Ritwik Acharyya, Shailesh Kumar, Sayan Kar·Aug 20, 2026SaveLearn
Gravitational-wave parameter estimation with machine-learning generated surrogate waveformsThe worldwide network of gravitational-wave detectors have detected more than 350 binary coalescence events till date. Future third-generation detectors, like Einstein telescope, are expected to…Suyog Garg, Kipp Cannon·Aug 20, 2026SaveLearn
The 2PN Point-Mass N-Body Equations of Motion in Harmonic Gauge: A Computable FormulationWe develop a semi-analytic and semi-numerical formulation of the harmonic-gauge second post-Newtonian (2PN) equations of motion for a general point-mass N-body system within Hadamard regularization.…Hongkun Huang, Jie Yang, Wei-Tou Ni·Aug 20, 2026SaveLearn
An Analytical Two Incompressible Fluid Star with a Mixed Ordinary Dark Matter Core and an Ordinary Matter EnvelopeWe construct an analytical relativistic two fluid star characterized by a mixed core, where ordinary matter and dark matter coexist as two independently conserved incompressible perfect fluids, and…Milko Estrada, Santiago Esteban Perez Bergliaffa·Aug 20, 2026SaveLearn
A Buchdahl solution generator for Einstein-sigma gravity and multiscalar-tensor gravityBuchdahl transformations provide a geometric route from vacuum spacetimes to scalar-field solutions. We formulate this mechanism as a target-covariant solution generator for Einstein gravity coupled…David S. Pereira, Francisco S. N. Lobo, José Pedro Mimoso·Aug 20, 2026SaveLearn
Spin-Inversion Degeneracies in Restricted Inspiral Waveforms for LISASpin inversions appear in several settings. Analytical work predicts a single spin flip during unequal-mass supermassive binary inspiral, while numerical relativity and post-Newtonian calculations…Kata Karácsonyi, László Árpád Gergely·Aug 20, 2026SaveLearn
Effective Field Theory for Freezing Gravity with Minimally Coupled MatterFreezing gravity (FG), a phantom-crossing dark energy model, was recently proposed in the absence of matter. In this work, we study FG minimally coupled to a perfect fluid through a detailed…Zhibang Yao·Aug 20, 2026SaveLearn
Analyzing Quasi-normal modes spectrum in asymptotically de Sitter black bounces and their optical appearanceThis work explores asymptotically de Sitter black-bounce spacetimes, obtained as a regular extension of the Schwarzschild-de Sitter geometry via the Simpson-Visser prescription. The resulting family…G. Alencar, Albert Duran-Cabacés, A. Lima et al.·Aug 20, 2026SaveLearn
Dynamics of Charged Radiating Collapse with Shear and AnisotropyWe investigate a charged anisotropic radiating stellar configuration undergoing gravitational collapse in the presence of shear and heat flux within the Einstein Maxwell framework. The interior…A. Khalid, Muhammad Bilal Riaz, S. A. Mardan et al.·Aug 20, 2026SaveLearn
Universal Relations for Neutron Stars from Asymptotic AnalysisDimensionless observables of neutron stars, such as the moment of inertia, the tidal deformability, the spin-induced quadrupole moment, and the compactness, satisfy the I--Love--Q and Love--C…Syo Kamata, Josuke Minamiguchi, Shuhei Minato·Aug 20, 2026SaveLearn
Kerr Quasinormal Modes without Variable Separation: A Two-Dimensional Hyperboloidal Teukolsky Solver with Physics-Informed Neural NetworksWe use physics-informed neural networks (PINNs) to solve the gravitational quasinormal-mode (QNM) eigenvalue problem for Kerr spacetime directly in the two-dimensional hyperboloidal formulation of…Antonio Ferrer-Sánchez, Daniela D. Doneva, José D. Martín-Guerrero et al.·Aug 20, 2026SaveLearn
How Inflation Might Explain Large-Scale AnisotropySeveral recent observational analyses have suggested the possible existence of anisotropy in our Universe. It is often thought that this would contradict the inflationary picture. We have argued that…Brett McInnes·Aug 20, 2026SaveLearn
Galactic microlensing by Lobo-Parsaei-Riazi phantom wormhole: Paczyński light curves and probabilistic featuresGravitational microlensing can provide a possible observational method for distinguishing between the signatures of massive and massless phantom wormholes. In this work, we consider Galactic…G. F. Akhtaryanova, R. Kh. Karimov, R. N. Izmailov et al.·Aug 20, 2026SaveLearn