A Descriptor Surrogate for Kerr Shadow ContoursWe consider the Kerr black hole shadow contour as a geometric object whose essential shape can be captured by a small set of physically transparent descriptors. Starting from exact critical-curve…Arseny Pantsialei·Jun 28, 2026SaveLearn
Volume-Distance-Ratio Asymptote and Spacetime Inextendibility for FLRW SpacetimesThis paper examines the volume-distance-ratio (VDR) asymptote at the past timelike boundary for Friedman-Lemaître-Robertson-Walker (FLRW) spacetimes. We consider spatially flat FLRW spacetimes with…Pengyu Le·Jun 28, 2026SaveLearn
Volume-Distance-Ratio Asymptote and Spacetime InextendibilityThis paper develops geometric criteria for determining the inextendibility of spacetimes near singularities based on asymptotic analysis of volume-distance relationships. We introduce and analyze the…Pengyu Le·Jun 28, 2026SaveLearn
Constraints on parity and Lorentz violations from gravitational waves: a comparison between single-parameter and multi-parameter analysisThe growing catalog of gravitational wave (GW) detections by the LIGO-Virgo-KAGRA Collaboration enables increasingly stringent tests of general relativity, particularly regarding possible violations…Wei-Hua Guo, Yuan-Zhu Wang, Tao Zhu et al.·Jun 28, 2026SaveLearn
Issue of Branched Hamiltonian, Inflation and indispensability of scalar field in generalized Teleparallel theoriesGeneralized Teleparallel gravity theories were proposed as alternatives to the dark energy and modified theories of gravity. However, minimal generalization of TEGR and STEGR lead to the issue of…Dalia Saha, Jyoti Prasad Saha, Abhik kumar sanyal·Jun 28, 2026SaveLearn
Quasi-normal modes as probes of black hole reentrant phase transitionsWe investigate the interplay between thermodynamic phase transitions and the dynamical behavior of quasi-normal modes (QNMs) in weakly nonlinear charged anti-de Sitter black holes. In a non-extended…M. Kord Zangeneh, S. Abdollahi, D. Afshar·Jun 27, 2026SaveLearn
Vacuum stability in Geometric Trinity of GravityThe decay of a metastable (false) vacuum plays a crucial role in constraining Standard Model and beyond the Standard Model physics. In particular, it has been shown that gravity can have a…Vincenzo Branchina, Salvatore Capozziello, Filippo Contino et al.·Jun 27, 2026SaveLearn
Quadrupole and quadratic-in-spin effects in quasicircular, spinning, asymmetric binariesNext-generation gravitational-wave detectors will require significant improvements in current theoretical waveform models, particularly in the case of asymmetric-mass binaries. Here we provide one…Mostafizur Rahman, Misbah Shahzadi, Adam Pound et al.·Jun 27, 2026SaveLearn
Non-perturbative, background independent canonical quantum gravity in Fock representationsIt is commonly believed that a quantum field theory of General Relativity requires a non-perturbative formulation. In addition, the background independence of classical General Relativity supplies a…Thomas Thiemann·Jun 27, 2026SaveLearn
Electromagnetic duality degeneracy in dynamical black hole mergersElectromagnetic duality is a symmetry of the source-free Einstein-Maxwell equations that rotates electric and magnetic fields while leaving the stress-energy tensor invariant. We present the first…José Ferreira, Gabriele Bozzola, Carlos A. R. Herdeiro et al.·Jun 27, 2026SaveLearn
Nonradial oscillations of realistic anisotropic neutron stars: Axial modesNon-radial oscillation modes of neutron stars serve as diagnostics of their internal composition and relativistic structure. In this work, we investigate the perturbations of static and spherically…Jose F. Rodriguez-Ruiz, L. M. Becerra, F. D. Lora-Clavijo·Jun 27, 2026SaveLearn
Accretion Disk Perturbations and Their Effects on Kerr Black Hole Superradiance and Gravitational Atom EvolutionKerr black hole (BH) superradiance can form gravitational atoms and produce characteristic gravitational-wave signals, providing a probe of ultralight bosons and dark matter. In realistic systems,…Ruiheng Li, Zhong-hao Luo, Zehong Wang et al.·Jun 27, 2026SaveLearn
Signatures of the Israel Junction II: Double Photon Rings in Slowly Rotating Kerr Spacetime with Thin ShellApplying the junction conditions to the slowly rotating Kerr spacetime with a thin shell, when higher order terms in the spin parameter a can be neglected, we find that while the angular momentum L…Long-Yue Li, Li-Ming Cao, Yungui Gong et al.·Jun 27, 2026SaveLearn
Quantum Field Theory in Successive Rindler SpacetimesWe study successive Rindler-like transformations in Minkowski spacetime and the corresponding sequence of vacuum states perceived by observers restricted to respective wedges. Extending the standard…Nitesh K. Dubey, Jaswanth Uppalapati, Sanved Kolekar·Jun 27, 2026SaveLearn
Quantum modified inertia: an application to galaxy rotation curvesThis work explores modified inertia in the context of galactic dynamics by investigating the consequences of introducing bounds on acceleration. Building on earlier ideas related to maximal…Jonathan Gillot·Jun 27, 2026SaveLearn
Complementarity of Gravitational Collapse (I) Origin of the Bekenstein-Hawking EntropyThrough two exact solution families to Einstein equation and one-to-one correspondence between their free parameters, we show that the ensemble of collapsars with arbitrarily close-to-implementing…Ding-fang Zeng·Jun 27, 2026SaveLearn
Complementarity of Gravitation Collapse (II) XOB and the Damping Gravitational Waveform as EvidencesThis is the second paper of our working series on the complementarity of gravitational collapse. In this paper we prove that dynamics of XOB (an eXact One-Body Method) under the weak-field-low-speed…Ding-fang Zeng·Jun 27, 2026SaveLearn
Kerr black hole in presence of force-free magnetic fieldWe extend the study of force-free magnetospheres from non-rotating to rotating black holes Sheikhahmadi and investigate the influence of a force-free magnetic field on the geometry around a…Haidar Sheikhahmadi·Jun 27, 2026SaveLearn
Thermodynamic Geometry, Heat Engines, and Topology of Sharma--Mittal ModMax-dRGT Black HolesWe investigate the thermodynamic structure of charged AdS black holes in ModMax nonlinear electrodynamics coupled to dRGT-like massive gravity, incorporating Sharma--Mittal entropy corrections. The…Hassan Hassanabadi, Abdullah Guvendi, Dhruba Jyoti Gogoi et al.·Jun 26, 2026SaveLearn
Generalizing the interacting dilatonic ghost condensate as a dark energy modelIn this article, we study the cosmic evolution of a generalized dilatonic ghost condensate field as a dark energy candidate, formulated from a Lagrangian density with two dominant kinetic terms; one…Manuel Gonzalez-Espinoza, Ramon Herrera, Johan Casimiro·Jun 26, 2026SaveLearn
Gravitational-wave response functions for space-borne detectors based on multiple geometric time-delay interferometry linksThe primary challenge for space-borne gravitational wave (GW) detectors lies in extracting the weak GW signal from instrumental noise that exceeds the signal level by many orders of magnitude.…Rui Luo, Pan-Pan Wang, Lin-Lin Yang et al.·Jun 26, 2026SaveLearn
Joint inference of line-of-sight acceleration and orbital eccentricity in neutron-star--black-hole binariesA line-of-sight acceleration (LOSA) of a compact-binary center of mass, imparted for example by a nearby tertiary perturber, imprints a Doppler modulation on the gravitational-wave signal and…Lorenzo Pompili, Aldo Gamboa, Alessandra Buonanno·Jun 26, 2026SaveLearn
Construction of Sensitivity Curves for Dynamic LISA and TaijiSpace-based gravitational-wave (GW) laser interferometers, including LISA and Taiji, are designed to observe gravitational waves in the millihertz band and are expected to open up a frequency range…Hong-Yu Shi, Yong Tang·Jun 26, 2026SaveLearn
Revisit Static Aether: Exact Vacuum Solution in Einstein-Aether Theory and Its Analytic ExtensionWe obtain an exact analytical vacuum solution of Einstein-Aether theory with a strictly static aether configuration and investigate its maximal extension. The solution depends only on the coupling…Jie Zhu, Hao Li·Jun 26, 2026SaveLearn
Probing Two Dark Dimensions through Primordial Black Holes, Gravitational Waves, and CollidersWe study primordial-black-hole (PBH) dark matter in the two-dark-dimensions (2DD) framework, a six-dimensional brane-world scenario with two compact extra dimensions and a fundamental gravity scale…Waqas Ahmed, George K. Leontaris·Jun 26, 2026SaveLearn