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.

Holographic Dark Energy with Hubble Radius as an Infrared Cutoff in Einstein-Cartan Gravity

This paper investigates non-interacting holographic dark energy with the Hubble radius as an infrared cutoff within Einstein-Cartan gravity, demonstrating that a Weyssenhoff spin fluid naturally induces a torsion scalar scaling as $\Phi \sim a^{-3}$ , which drives cosmic acceleration, allows the dark energy equation of state to cross the phantom divide, and modifies the cosmic distance duality relation while remaining consistent with recent DESI observations.

Yongjun Yun, Jungjai Lee2026-05-22⚛️ gr-qc

Dark photon -- Assisted Primordial Magnetogenesis

This paper proposes a minimal mechanism where coupling dark photons with standard photons generates primordial magnetic fields of approximately $10^{-13}$ G, effectively overcoming the strong-coupling and backreaction problems that plague conventional nonminimal inflaton-electromagnetic field models.

Debottam Nandi (VIT Chennai), Debajyoti Choudhury (University of Delhi)2026-05-22✓ Author reviewed ⓘ⚛️ gr-qc

Signatures of Modified Gravity Below $\mathcal{O}(10)$ Mpc in a Dynamical Dark Energy Background

This study demonstrates that within a dynamical dark energy (CPL) framework, modified gravity effects capable of suppressing low-redshift structure growth while satisfying CMB constraints must operate on comoving scales smaller than approximately 10 Mpc, a scenario that is moderately preferred over standard $\Lambda$ CDM and further strengthens the case for quintom-like dark energy when combined with current cosmological datasets.

Yo Toda, Adrià Gómez-Valent2026-05-22⚛️ gr-qc

Constraining Spatial Curvature with Priors from Swampland Conjectures

This paper investigates how swampland-motivated priors on the slope and field excursion of an exponential quintessential dark energy model, when combined with observational data from Planck, DESI, and supernovae, can shift the inferred value of spatial curvature ( $\Omega_k$ ) compared to standard theory-agnostic analyses.

Simran Arora, Hun Jang, Shinji Mukohyama2026-05-22⚛️ hep-th

Black hole dark monopole system

This paper investigates a system of electric charges from visible and dark matter sectors near magnetic poles, revealing that such stationary charges possess intrinsic angular momentum and, when placed outside a magnetically charged black hole in dark photon theory, cause the spacetime to appear as a stationary axisymmetric black hole at large distances.

Marek Rogatko2026-05-22⚛️ gr-qc

Topological Thermodynamics of Generalized Bardeen Black Hole

This paper employs the generalized off-shell Helmholtz free energy method within a topological framework to analyze the thermodynamic properties and phase transitions of the generalized Bardeen black hole, revealing that its regular configurations possess two topological defects with opposite winding numbers that cancel out, unlike the single unstable branch found in the Schwarzschild case.

A. A. M. Silva, M. H. Macedo, R. R. Landim2026-05-22⚛️ gr-qc

Dimming of Photon Ring due to Photon-Axion Conversion around Kerr Black Holes

This paper investigates how photon-axion conversion in the strong gravitational fields of rotating Kerr black holes, particularly around M87*, causes observable dimming of photon spectral luminosity in X-ray and gamma-ray bands, offering a potential method for future high-resolution telescopes to constrain axion properties.

Rahul Dhyani, Sauvik Sen, Indrani Banerjee, Ashmita Chakraborty, Arindam Chatterjee2026-05-22⚛️ gr-qc

Reconstructing slow-roll Scalar-Tensor Gauss-Bonnet single field inflation from running spectral data

This paper investigates slow-roll inflation within a broad class of scalar-tensor Gauss-Bonnet models by deriving theoretical predictions for spectral observables and their higher-order runnings, establishing consistency equations, and constraining model parameters against the latest Planck observational data.

A. Belhaj, H. Es-Sobbahi, M. Oualaid, E. Torrente-Lujan2026-05-21⚛️ hep-th

Finite Curvature Construction of Regular Black Holes and Quasinormal Mode Analysis

This paper constructs a class of regular black hole geometries with finite curvature invariants using various analytic profiles and demonstrates that their dynamical stability under axial gravitational perturbations is critically determined by the shape of the effective potential, particularly the peak-to-valley ratio.

Chen Lan, Zhen-Xiao Zhang, Hao Yang2026-05-21⚛️ gr-qc

Connecting Early Dark Energy to Late Dark Energy by the Diluting Matter Potential

This paper proposes a scale-invariant gravity model with a matter-dependent potential that unifies inflation, early dark energy, and late dark energy, offering a mechanism to alleviate the Hubble tension by modifying the sound horizon while remaining consistent with CMB, BAO, and local $H_0$ observations.

Eduardo I. Guendelman, Ramon Herrera, Pedro Labrana2026-05-21⚛️ gr-qc

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