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.

Universal Non-Gaussian Signatures from Transient Instabilities

This paper identifies universal non-Gaussian signatures in the inflationary bispectrum arising from transient tachyonic instabilities of entropic fluctuations, demonstrating that exact numerical calculations reveal distinctive features like magnified folded configurations and tachyonic resonances that cannot be fully captured by single-field effective descriptions, while providing new templates for observational constraints on non-geodesic inflationary attractors.

Shuntaro Aoki, Diederik Roest, Denis Werth2026-04-02⚛️ gr-qc

Universal $T$ -matrices for quantum Poincaré groups: contractions and quantum reference frames

This paper develops a contraction theory for universal $T$ -matrices of quantum groups to derive a new (1+1) centrally extended quantum Poincaré algebra whose dual form naturally describes relativistic quantum reference frame transformations and contracts to the known Galilei $T$ -matrix for non-relativistic frames.

Angel Ballesteros, Diego Fernandez-Silvestre, Ivan Gutierrez-Sagredo2026-04-02🔢 math-ph

Thermodynamics, Shadow, and Quasinormal Modes of AdS Ayón--Beato--García Massive Black Hole

This paper investigates the thermodynamics, photon sphere, shadow, and dynamical stability of an AdS Ayón-Beato-García massive black hole, revealing how graviton mass and magnetic charge influence its Gibbs free energy, shadow radius, and quasinormal modes while confirming its overall stability.

Dharm Veer Singh, Sudhaker Upadhyay, Amit Kumar, Yerlan Myrzakulov, Kairat Myrzakulov, Himanshu Kumar Sudhanshu2026-04-02⚛️ gr-qc

Cosmology from asymptotically safe Proca theories

This paper initiates a program to investigate the ultraviolet completion of generalised Proca theories within the asymptotic safety paradigm, identifying non-perturbative fixed points that demonstrate the renormalisability of vector-tensor theories and constrain viable late-time cosmological scenarios.

Carlos Pastor-Marcos, Lavinia Heisenberg, Álvaro Pastor-Gutiérrez, Jan M. Pawlowski, Manuel Reichert2026-04-02⚛️ gr-qc

Cosmological zoom-in perturbation theory as a consistent beyond point-particle approximation framework

This paper proposes a covariant multi-scale framework that resolves the limitations of geodesic flow in general relativity by decomposing spacetime into hierarchical regions, providing a first-principles foundation for cosmological zoom-in simulations that naturally explains flat galaxy rotation curves through geometric backreaction without requiring dark matter.

Obinna Umeh2026-04-02⚛️ gr-qc

Cosmological Wavefunctions as Amplitudes: Dual Shuffle Factorization and Uniqueness from New Hidden Zeros

This paper demonstrates that tree-level cosmological wavefunctions in $\phi^n$ theories are uniquely determined by locality and a newly discovered set of hidden zeros that enforce a dual "shuffle" factorization principle, thereby extending on-shell methods and the zeros-BCFW correspondence from flat-space scattering amplitudes to cosmology.

Yang Li, Laurentiu Rodina2026-04-02⚛️ hep-th

Earliest Structures in the Universe can be explained by a Relativistic Cosmological Perturbation Theory

This paper presents a relativistic cosmological perturbation theory that uniquely defines energy and particle number density perturbations to explain the mass and formation times of the universe's earliest structures, attributing their rapid initial growth to negative nonadiabatic pressure perturbations arising during the matter-radiation decoupling era.

Pieter G. Miedema2026-04-01⚛️ gr-qc

Radial canonical $Λ<0$ gravity

This paper applies an ADM deparametrization strategy to radial canonical $\Lambda < 0$ gravity in three dimensions to clarify holographic interpretations through identified radial 'volume time' and 'true' degrees of freedom, while also discussing York time, conformal boundary conditions, and constructing a BTZ wavepacket solution to the radial Wheeler-DeWitt equation.

Nele Callebaut, Blanca Hergueta2026-04-01⚛️ gr-qc

Thermodynamics of analogue black holes in a non-Hermitian tight-binding model

This paper proposes a non-Hermitian tight-binding model with gain/loss and non-reciprocal hopping that emulates black-hole physics by mapping a 1D lattice interface to a Schwarzschild metric, enabling the theoretical calculation of Hawking radiation, temperature, entropy, and mass, along with a proposed experimental realization for detecting these elusive features.

D. F. Munoz-Arboleda, M. Stålhammar, C. Morais Smith2026-04-01🔬 cond-mat.mes-hall

Einstein's Equations in Electromagnetic Media

This paper extends Plebanski's mapping to encode the Einstein equations in ADM form within a bianisotropic electromagnetic medium by translating gravitational constraints and evolution equations into dynamical conditions on the medium's constitutive parameters, ultimately deriving gravitational-wave analogues as optical perturbations in a vacuum linearization.

Eren Erberk Erkul, Ulf Leonhardt2026-04-01⚛️ gr-qc

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