gr-qc papers | Gist.Science

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.

On Gauge-Invariant Entire-Function Regulators and UV Finiteness in NonLocal Quantum Field Theory

This article demonstrates that the implementation of gauge-invariant regulators as entire functions of the covariant Laplace–Beltrami operator within the framework of the background field method induces an exponential ultraviolet damping in loop integrals without introducing new singularities, thereby providing a rigorous gauge-covariant justification for ultraviolet finiteness in nonlocal quantum field theories.

J. W. Moffat, E. J. Thompson2026-04-28⚛️ gr-qc

Bounds on the photon sphere radius for spherically symmetric black holes in n-dimensional Einstein gravity

This paper derives dimension-dependent upper and lower bounds on the photon sphere radius for static, spherically symmetric, asymptotically flat black holes in $n$ -dimensional Einstein gravity, generalizing known four-dimensional results to higher dimensions under specific energy conditions.

Yong Song, Jiaqi Fu, Yiting Cen2026-04-28⚛️ gr-qc

Non-Equilibrium Relativistic Core Collapse of Self-Interacting Dark Matter Halos -- Limits On Seed Black Hole Mass

By applying the Misner-Sharp formalism to model the non-equilibrium, general-relativistic collapse of self-interacting dark matter halos, this study finds that intense heat flux during the late stages of collapse limits the resulting seed black hole mass to approximately $3\times10^{-8}$ of the halo mass, suggesting that baryonic processes are likely necessary to explain the existence of early supermassive black holes.

Hua-Peng Gu, Fangzhou Jiang, Xian Chen, Ran Li2026-04-28⚛️ gr-qc

Graph models for covariant holographic entropy I

This article constructs a graph model for covariant holographic entropies in time-dependent spacetimes by identifying a geometric condition that incorporates exposed regions and prevents unphysical shortcuts, thereby proving the equivalence between covariant and static holographic entropy cones and paving the way toward a complete covariant construction.

Bowen Zhao2026-04-28⚛️ gr-qc

Extreme-mass ratio inspirals in Schwarzschild - de Sitter spacetime I: Weak-field orbits

This work investigates how deviations from asymptotic flatness, modeled by a Schwarzschild-de Sitter parameter, alter the orbital evolution and gravitational wave signatures of extreme-mass-ratio inspirals, and demonstrates that while cosmological effects are negligible, astrophysical environmental corrections could significantly bias event-rate estimates and waveform templates for future space-based detectors.

John Adrian N. Villanueva, Ian Vega2026-04-28⚛️ gr-qc

Solving Einstein's Equation Numerically on Manifolds with Non-Orientable Spatial Slices

This paper presents numerical methods and specific solutions to Einstein's equations to explore cosmological models on compact, non-orientable spatial manifolds with varying curvatures.

Fan Zhang, Lee Lindblom2026-04-28⚛️ gr-qc

Cosmological evolution of interacting dark energy with a CPL equation of state

This paper investigates interacting dark energy models using the CPL parametrization, finding that while an interaction term proportional to dark energy density ( $Q = \beta H \rho_{de}$ ) provides a slightly better fit to observational data than the non-interacting model, the $\Lambda$ CDM model remains statistically preferred due to its simplicity.

Gerald Neumann, Nelson Videla, Dorian Araya2026-04-28🔭 astro-ph

Parametric Resonance in $\phi^4$ Preheating: An Exact Numerical Study

This paper presents a fully numerical study of parametric resonance in $\phi^4$ preheating, demonstrating that exact simulations reveal complex, coupling-dependent dynamics—such as mode-specific saturation and stochastic behavior—that differ significantly from traditional analytical approximations.

Hrisikesh Thakur, Malay K. Nandy2026-04-28⚛️ hep-ph

Ground measurements of the gravitational redshift questioned:re-establishing the physical bases

This paper refutes a recent claim that the Pound-Rebka experiment measured Doppler shifts instead of gravitational redshift, arguing that the critique is based on a misunderstanding of reference systems and an unphysical interpretation of forces.

Anna M. Nobili, Alberto Anselmi2026-04-28⚛️ gr-qc

Testing Scalar Field Dark Matter models in M31 galaxy through the Rotation Curve analysis

This paper evaluates various scalar field dark matter models against the rotation curve of the Andromeda galaxy (M31), finding that a two-component bulge baryonic structure combined with a smooth cored halo, such as Fuzzy Dark Matter, provides the most statistically consistent fit.

Gulnara Suliyeva, Kuantay Boshkayev, Talgar Konysbayev, Yergali Kurmanov, Guldana Rabigulova2026-04-28⚛️ hep-ph

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