⚛️ Category

gr-qc

3826 papers

Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.

At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.

⚛️ general relativity

Nonlinear electrodynamics in Kerr-Newman-NUT-Λ\Lambda spacetime: exact solutions, horizons, and energy conditions

This paper constructs two exact nonlinear electrodynamics generalizations of the Kerr-Newman-NUT-Λ\Lambda spacetime by solving a key integrability condition for cubic and quartic electromagnetic potentials, yielding explicit metrics, field configurations, and energy condition analyses that reveal a persistent Kerr-like curvature singularity alongside a NUT axial conical singularity.

Oscar Galindo-Uriarte, Nora Breton, Claus Lämmerzahl, Alfredo Macías2026-07-28
⚛️ general relativity

Optical Appearance of a Rotating Black Hole in Nonlinear Electrodynamics Surrounded by Thin Accretion Disks

This study utilizes backward ray-tracing simulations to demonstrate that the electric charge (QQ) and nonlinear electrodynamics parameter (β\beta) distinctly influence the shadow size, distortion, and redshifted emission patterns of rotating black holes surrounded by thin accretion disks, offering potential signatures for future high-resolution astronomical observations.

Abdul Malik Sultan, Manahil Ali, Muhammad Israr Aslam, Zi-Chao Lin2026-07-28
⚛️ general relativity

On the effect of gravitational repulsion on geodesic deviation in the Schwarzschild-de Sitter spacetime

This paper investigates how gravitational repulsion in Schwarzschild-de Sitter spacetime alters geodesic deviation across a critical surface, demonstrating that analyzing these deviations allows for the precise identification of regions dominated by either attractive or repulsive gravity.

Rohit Ghosh, Biplab Raychaudhuri, Aditya S. Mondal, Mahasweta Bhattacharya2026-07-28
⚛️ general relativity

Black hole shadow parameters and quasi-normal modes for Weyl-incorporated gravity

This paper investigates the shadow parameters and fundamental quasi-normal mode frequencies of black holes within the Modified Relativistic Dynamics (MORD) framework of Weyl-interaction gravity, analyzing their dependence on the coupling parameter λ\lambda under conditions of constant-density baryonic matter halos and homogeneous plasma backgrounds.

Noraiz Tahir, Mubasher Jamil, Kaynat Fatima, Tajammal Hussain Khokhar2026-07-28
⚛️ general relativity

Upper bounds on the force function in spatially regular self-gravitating matter configurations

This paper establishes four new upper bounds on the dimensionless force function in spherically symmetric, spatially regular self-gravitating matter configurations by proving that the force is strictly limited to values of 2, 1, or 1/2 depending on whether the matter is generic or isotropic and whether it satisfies the dominant energy condition or has a non-positive energy-momentum trace, thereby supporting the maximum force conjecture in general relativity.

Shahar Hod2026-07-28
⚛️ general relativity

Gravitational Lensing of Gravitational Waves: Towards a Higher-order Geometric-optics Approach

This paper extends the geometric-optics approximation to higher orders using the Newman-Penrose formalism to model gravitational wave lensing, revealing that apparent vector and scalar modes in lensed signals are propagation artifacts caused by wavefront distortion and polarization plane smearing rather than genuine dynamical degrees of freedom.

Zhao Li, Shaoqi Hou, Wen Zhao2026-07-28
⚛️ general relativity

Gravitational Wave Signatures of Periodic Orbits around a Schwarzschild-like Black Holes Submerged in an Exponential Density Dark Matter Profile

This paper demonstrates that extreme-mass-ratio inspiral (EMRI) gravitational wave signatures around Schwarzschild-like black holes embedded in exponential dark matter halos exhibit distinct, non-monotonic dependencies on the halo's scale radius and mass, offering a viable strong-field method to disentangle the total mass and spatial extent of dark matter distributions.

Mohammad Reza Alipour, Saeed Noori Gashti, Mohammad Ali S. Afshar, Behnam Pourhassan2026-07-28