⚛️ Category

gr-qc

3255 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.

Induced Multi-phase Inflation with Reheating: Leptogenesis and Dark Matter Production in Metric versus Palatini

This paper investigates non-minimally coupled scalar-induced multi-phase inflation in both metric and Palatini gravity, demonstrating that while both frameworks align with observational constraints on the spectral index, Palatini models predict a significantly lower tensor-to-scalar ratio and sub-Planckian field excursions, leading to distinct reheating dynamics that constrain the production of dark matter and the viability of non-thermal leptogenesis within a Type-I seesaw framework.

Nilay Bostan, Rafid H. Dejrah, Anish Ghoshal, Zygmunt Lalak2026-04-14⚛️ hep-ph

Relativistic figures of equilibrium in the Wald magnetosphere

This paper demonstrates that self-gravitating, rigidly rotating charged perfect fluids with vanishing electric conductivity can exist in equilibrium within Wald's magnetosphere in non-vacuum spacetimes, deriving integrable Einstein-Euler equations with modified Euler-Bernoulli terms and providing numerical solutions for constant density and polytropic cases.

Paweł Doruchowski, Patryk Mach, Audrey Trova, Bakhtinur Juraev2026-04-14⚛️ gr-qc

Inflationary magnetogenesis from non-minimal coupling in large- and small-field potentials

This paper demonstrates that a non-minimal Yukawa-like coupling between the inflaton and the Ricci scalar acts as a timing parameter to regulate backreaction and the Schwinger effect, thereby enabling large-field inflation models to generate observable magnetic fields up to 10−1310^{-13} G while rendering small-field scenarios non-predictive.

Orlando Luongo, Antonino Giacomo Marino, Tommaso Mengoni2026-04-14🔭 astro-ph

An Analytic Formalism of Inflation for Derivative Coupled Scalar Field and Validating its predictions for Some Inflationary Potentials

This paper proposes an analytic formalism for a non-minimally coupled inflationary model involving derivative interactions between gravity and a scalar field, demonstrating that it successfully generates scalar spectral index and tensor-to-scalar ratio values consistent with ACT and Planck observations across a wide range of inflaton potentials without encountering singularities in the slow-roll regime.

Aayush Randeep, Rajib Saha2026-04-14⚛️ hep-ph

Geometrically Significant Surfaces of Black Holes from a Single Scalar

This paper demonstrates that a single scalar function, derived from the analytically continued membrane-paradigm pressure of the Kerr-Newman black hole, serves as a unified global detector that simultaneously encodes the locations of all critical geometric surfaces—including horizons, stationary limits, singularities, and asymptotic infinity—while also admitting an interpretation as a generalized van der Waals equation of state.

Cagdas Ulus Agca, Bayram Tekin2026-04-14⚛️ gr-qc

Entropy-Deformed Hamiltonian Dynamics of Schwarzschild Black Holes: A Superstatistical Approach

This paper demonstrates that introducing entropic deformations derived from generalized superstatistical entropies into the Hamiltonian dynamics of Schwarzschild black holes regularizes the classical singularity into a finite, high-curvature transition layer, thereby reproducing loop quantum gravity phenomenology without relying on polymer discretization.

O. Garcia, O. Obregón, J. Ríos Padilla2026-04-14⚛️ gr-qc