Higher Dimensional Loop Quantum Black hole in de Sitter Spacetime: Quasinormal Modes and Shadow SignaturesWe investigate the dynamical and optical properties of a higher-dimensional loop-quantum-corrected black hole in a de Sitter background. We first analyze the horizon structure and identify the…Sara Saghafi, Kourosh Nozari, Ali Mohammadpour·Jun 10, 2026SaveLearn
Maxwell equations in Schwarzschild spacetime for static and freely falling observersClassical electrodynamics in curved spacetime is formulated within a tetrad-based framework that preserves the direct physical interpretation of the electromagnetic fields measured by an observer.…F. L. Carneiro, L. V. A. Cunha·Jun 10, 2026SaveLearn
Gotta light? Illuminating AGN disks with LISA EMRIsWe study the ability of the upcoming Laser Interferometer Space Antenna (LISA) to constrain gas torques acting on extreme-mass-ratio inspirals (EMRIs) when these are embedded in accretion disks,…Federico Fantocolli, Francisco Duque, Jonathan Gair·Jun 10, 2026SaveLearn
A post-selected quantum model of cosmic accelerationThe origin of cosmic acceleration remains a central problem in cosmology, commonly attributed to a cosmological constant within the ΛCDM model or to dynamical dark energy. Here, we develop an…Dimitris Lionas, Charis Anastopoulos, Konstantinos Gourgouliatos·Jun 10, 2026SaveLearn
Critical Coupling Surfaces in κ(R,T) Gravity: Regularity, Gravitational Screening, and Phase TransitionsWe investigate the critical regime κ(R,T)=0 in κ(R,T) gravity. While most studies assume a non-vanishing effective gravitational coupling, the existence of critical hypersurfaces where κ…Ginés R. Pérez Teruel·Jun 10, 2026SaveLearn
Comisso-Asenjo Mechanism in Rotating N=2,U(1)2 Gauged Supergravity Black Holes: Extended Comparison With Kerr Black HoleIn this paper, we investigate energy extraction via the Comisso-Asenjo (CA) magnetic reconnection process near a coupled N=2,\,U(1)2 gauged supergravity Black Hole (BH). Our study…Abhinav Jaguri, Hemwati Nandan, Pankaj Sheoran et al.·Jun 10, 2026SaveLearn
Periodic orbits as probes of charged loop quantum gravity black holes through gravitational wavesGravitational waves from extreme-mass-ratio inspirals (EMRI) provide a direct probe of the strong-field geometry of black holes. Motivated by this, we study the motion of test particles and the…Abolhassan Mohammadi, Arun Kumar, Hongwei Tan et al.·Jun 10, 2026SaveLearn
Horizon absorption in eccentric precessing binary black hole inspirals and its importance for gravitational wave data analysisDuring the evolution of a binary black hole, energy and angular momentum are exchanged between the orbital motion and the individual black holes through horizon absorption, modifying both the binary…Alberto Álvaro-Díaz, Gonzalo Morras·Jun 10, 2026SaveLearn
Bouncing singularities in Schwarzschild: a geometric origin of the QNM convergence regionWe show analytically that the convergence of the QNM expansion of the retarded Green's function of the Schwarzschild spacetime is set by a singularity in the complex time plane. The singularity…Paolo Arnaudo, Benjamin Withers·Jun 10, 2026SaveLearn
Classical tests of New General RelativityIn New General Relativity (NGR), the static spherically symmetric vacuum solution is characterized by two parameters, unlike General Relativity (GR), where the Schwarzschild solution has only one…V. P. Vandeev, V. A. Parkhomenko, A. N. Semenova et al.·Jun 10, 2026SaveLearn
Time evolution of semiclassical states in the one-vertex model of quantum-reduced loop gravityWe compute numerically the time evolution of simple semiclassical states describing homogeneous and isotropic spatial geometries in quantum-reduced loop gravity under a deparametrized formulation of…Ilkka Mäkinen·Jun 10, 2026SaveLearn
Inflationary branch decoherence and the cosmological arrow of timeWe analyze branch decoherence in inflationary quantum cosmology by computing reduced density matrices and branch-overlap factors for long-wavelength perturbations. The Hartle-Hawking no-boundary…Ali Nayeri·Jun 10, 2026SaveLearn
Model-agnostic search of gravitational wave echoes in LVK dataGravitational wave echoes offer a unique probe of the near-horizon structure of astrophysical black holes, beyond the standard "black hole spectroscopy." Theoretical waveform predictions,…Di Wu, Xi-Li Zhang, Qing-Guo Huang et al.·Jun 10, 2026SaveLearn
Optimal Control Theory of the (2+1)-Dimensional BTZ Black HoleWe apply a finite-time geometric optimization framework to investigate thermal fluctuations and (non)equilibrium optimal processes in the (2+1)-dimensional BTZ black hole. Employing Hessian…M. Radomirov, R. C. Rashkov, G. S. Stoilov et al.·Jun 10, 2026SaveLearn
Spin-up and mass-gain in hyperbolic encounters of spinning black holesScattering black holes spin up and gain mass through the re-absorption of orbital angular momentum and energy radiated in gravitational waves during their encounter. In this work, we perform a series…Healey Kogan, Frederick C. L. Pardoe, Helvi Witek·Jun 10, 2026SaveLearn
Charged particle dynamics in magnetosphere generated by current loop around Schwarzschild black holeWe present a theoretical study of the magnetic field generated by a toroidal current loop situated in the equatorial plane of a non-rotating Schwarzschild black hole, based on the dynamics of charged…Martin Kološ, David Kofroň·Jun 10, 2026SaveLearn
Formation of Bound States in Quintessence Alternative TheoriesWe study the formation and behaviour of bound states formed outside the horizon of a black hole in the presence of quintessence matter. Calculating the Regge and Wheeler potential for general metric…George Koutsoumbas, Andri Machattou, Eleftherios Papantonopoulos·Jun 10, 2026SaveLearn
Cosmologies with a magnetic field, dust, and LambdaWe investigate exact solutions of the Einstein-Maxwell equations with the cosmological constant where the source of the gravitational field consists of a magnetic field and dust. In particular, we…Martin Zofka, Kjell Rosquist·Jun 10, 2026SaveLearn
Black Hole Radiation Sparsity and Bekenstein Entropy Loss in Non-Commutative Schwarzschild SpacetimeIn this paper, we investigate the sparsity of black hole radiation, the Bekenstein entropy loss, and the total particle emission of a Schwarzschild black hole (SBH) within the framework of…Abdellah Touati·Jun 9, 2026SaveLearn
Statistical-Uncertainty-Driven Selection of Evaluation Frequency for Time-Dependent Sensing Calibration: A Demonstration with KAGRA DataAccurate calibration of the gravitational-wave strain h(t) is essential for both detection and astrophysical inference. In operating detectors, slow temporal variations in the sensing response are…Shingo Hido, Takahiro Yamamoto, Dan Chen et al.·Jun 9, 2026SaveLearn
On phase-space singular surfaces in f(R) gravityWe perform a Hamiltonian constraint analysis of metric f(R) gravity in the Jordan frame and show that the regular constraint classification degenerates on singular phase-space surfaces located at…Dražen Glavan, David M. J. Vokrouhlický·Jun 9, 2026SaveLearn
Linearized stability of T-duality quantum-inspired thin-shell wormholesWormholes that are traversable in principle offer fascinating insights into general relativity, yet they typically require exotic matter and suffer from stability issues. We construct a thin-shell…Francisco S. N. Lobo, Manuel E. Rodrigues·Jun 9, 2026SaveLearn
Slowly rotating traversable wormholes supported by radially varying string-fluid matter: From regular geometries to photon trajectoriesThis work investigates slowly rotating traversable wormholes supported by string fluids whose properties vary with distance from the throat. This radial variation allows the matter to transition…A. Errehymy, B. Turimov, M. A. Khan et al.·Jun 9, 2026SaveLearn
A Friendly Phantom: Late-time AdS-to-dS transition and cosmological tensionsWe present Ph-Λ sCDM, a phantom-scalar realization within General Relativity of the sign-switching cosmological-constant idea, Λ sCDM, in which a phantom scalar evolving on a bounded…Özgür Akarsu, Leandros Perivolaropoulos, A. Emrah Yükselci et al.·Jun 9, 2026SaveLearn
Convex foliations and trapped submanifoldsThe conjecture that compact trapped submanifolds (CTMs) of any codimension greater than one cannot intersect the domain of outer communications of a black hole is tested in symmetrically collapsing…Gustavo Dotti·Jun 9, 2026SaveLearn