Quantum speed limit time of a uniformly accelerated Unruh-DeWitt detectorWithin the open quantum system formalism, using the Markovian process, we investigate the quantum speed limit time (QSLT) of a uniformly accelerated Unruh-DeWitt detector, interacting with the…Debasish Ghosh, Bibhas Ranjan Majhi·Aug 21, 2026SaveLearn
Kerr-Newman and genuine Kerr black holes in the Bertotti-Robinson magnetic fieldWe present a spacetime that describes a rotating and charged black hole immersed in an external magnetic field. This exact solution to the Einstein-Maxwell equations has a surprisingly simple form…Hryhorii Ovcharenko, Jiri Podolsky·Aug 21, 2026SaveLearn
Beyond de Sitter: Longitudinal-Mode Instabilities and Spectral Evolution of Massive Vector Fields with Non-Minimal Curvature Coupling during InflationWe investigate the inflationary dynamics of a spectator massive vector field with a non-minimal curvature coupling in de Sitter (dS) and quasi-de Sitter (qdS) backgrounds, focusing on the transverse…Ehsan Momeni, Fatimah Shojai·Aug 21, 2026SaveLearn
Dual entropy gain by radiation at the zero temperature limitRecently we have demonstrated that black hole radiation can be smoothly extended to the zero-temperature limit. Here we analyse entropy variations at the zero temperature limit and evaluate the…Koray Düztaş·Aug 21, 2026SaveLearn
Black hole singularity is a surface not a pointIt is widely repeated in the popular literature and elsewhere that the singularity at the center of a black hole is a point. It is not true. Two observers who free-fall into a spherical black hole…Andrew J. S. Hamilton, Tyler McMaken·Aug 21, 2026SaveLearn
Study of Dynamical Instability of Collapsing Charged Spherically Symmetric Anisotropic Matter Configurations within Non-Minimally Coupled GravityWe investigate the dynamical instability and gravitational collapse of charged, spherically symmetric anisotropic matter configurations within f(R,Lm) gravity. The analysis focuses on…A. Rehman, M. Yousaf, Mohammed Zakarya et al.·Aug 21, 2026SaveLearn
Electrically Charged Non-Abelian Black String in Anti-de Sitter SpaceWe construct a new family of static, electrically charged, cylindrically symmetric black-string solutions of four-dimensional Einstein--Yang--Mills theory with a negative cosmological constant,…G. Alencar, R. N. Costa Filho, I. Jardim et al.·Aug 21, 2026SaveLearn
Chiral symmetry and black hole isospectralityWe prove that black-hole isospectrality between linearly independent solutions follows whenever radiative metric and matter perturbations are reconstructed from complex master variables obeying a…Colin Weller, Dongjun Li, Pratik Wagle et al.·Aug 21, 2026SaveLearn
Static electric and magnetic traversable wormholes in (2+1)-dimensional nonlinear electrodynamicsEvery traversable wormhole reported so far in static (2+1) gravity coupled to nonlinear electrodynamics has come from a power-Maxwell Lagrangian L propto |F|k restricted to k=1/2, always forcing the…Mauricio Cataldo·Aug 21, 2026SaveLearn
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