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.

Optical design and sensitivity optimization of Cryogenic sub-Hz cROss torsion bar detector with quantum NOn-demolition Speed meter (CHRONOS)

This paper presents the optical design and sensitivity optimization of the 2.5 m CHRONOS, a cryogenic triangular Sagnac speed-meter interferometer that achieves a quantum-noise-limited strain sensitivity of approximately $3\times10^{-18}\,\mathrm{Hz^{-1/2}}$ at 1 Hz through optimized mirror configurations and recycling techniques, serving as a scalable laboratory testbed for future sub-hertz gravitational wave detection.

Yuki Inoue, Daiki Tanabe, M. Afif Ismail, Vivek Kumar, Mario Juvenal S Onglao, Ta-Chun Yu2026-02-24⚛️ gr-qc

Quasi-Normal Mode Ringing of Binary Black Hole Mergers in Scalar-Gauss-Bonnet Gravity

This paper presents fully non-linear numerical simulations of binary black hole mergers in scalar-Gauss-Bonnet gravity to extract quasi-normal mode excitation amplitudes and phases, verifying that while mode frequencies align with theoretical predictions, the deviations in excitation from General Relativity remain relatively small even near the theory's hyperbolicity limit.

Zexin Hu, Daniela D. Doneva, Stoytcho S. Yazadjiev, Lijing Shao2026-02-24⚛️ gr-qc

When spacetime vibrates: An introduction to gravitational waves

This article provides a comprehensive overview of gravitational waves, tracing their theoretical origins in general relativity and historical prediction to their experimental confirmation via interferometers like LIGO and Virgo, while analyzing their emission mechanisms, detection milestones such as GW150914, and their transformative role in multi-messenger astronomy.

José P. S. Lemos2026-02-24⚛️ gr-qc

When inflationary perturbations refuse to classicalise: the role of non-Gaussianity in Wigner negativity

By computing the Wigner function of inflationary curvature perturbations using the EFT of inflation, this paper demonstrates that primordial non-Gaussianities generate persistent quantum interference fringes and growing Wigner negativity on super-Hubble scales, proving that squeezing alone is insufficient to ensure classicality and suggesting that genuinely quantum signatures of the universe's origins may be detectable.

Aurora Ireland, Vincent Vennin2026-02-24⚛️ gr-qc

New Rotating Black Holes in String Theory

This paper introduces new rotating, asymptotically flat black hole solutions in string theory with linear dilaton vacua and mass-independent temperatures, demonstrating their derivation from the large- $d$ limit of Myers-Perry black holes and highlighting their unique thermodynamic properties and restricted asymptotic symmetry groups.

Watse Sybesma, Poula Tadros2026-02-24⚛️ gr-qc

Population-coherence routes to purity in Page-type models of black-hole evaporation

This paper introduces a population-coherence decomposition of density-matrix purity to demonstrate that in Page-type black-hole evaporation models with uniform radiation populations, the late-time recovery of information is driven exclusively by coherence rather than population changes.

José J. Gil2026-02-24⚛️ gr-qc

Exploring the Universe Expansion History with f(R,T) Gravity: Constraints on Cosmological Parameters

This paper investigates two specific $f(R,T) = R + \alpha T^n$ gravity models with $n=1$ and $n \neq 1$ , demonstrating through observational data analysis and parameter constraints that they successfully reproduce the Universe's transition from deceleration to late-time acceleration while remaining consistent with the standard $\Lambda$ CDM model and satisfying key energy conditions.

Mustapha Lamaaoune2026-02-24⚛️ gr-qc

Thermal aspects and particle dynamics of Euler-Heisenberg AdS black hole in 4D Einstein Gauss-Bonnet gravity

This paper constructs and analyzes charged AdS black hole solutions in 4D Einstein-Gauss-Bonnet gravity coupled to Euler-Heisenberg nonlinear electrodynamics, demonstrating how higher-curvature and nonlinear electromagnetic corrections significantly alter horizon structures, thermodynamic phase transitions, Joule-Thomson expansion, and particle dynamics.

Bilel Hamil, Faisal Javed2026-02-24⚛️ gr-qc

A New Perspective on the Cosmological Constant and Its Core Problems

This paper proposes a novel physical interpretation of the cosmological constant and introduces a "Breaking Energy-Momentum Symmetry" mechanism within alternative gravity theories to resolve the long-standing fine-tuning and coincidence problems that plague the standard LCDM framework.

H. R. Fazlollahi2026-02-24⚛️ gr-qc

Improving calibration accuracy with torque coupled gravity field calibrator for sub-Hz gravitational wave observation in CHRONOS

This paper demonstrates that optimizing the geometrical configuration of a torque-coupled gravity field calibrator significantly enhances the signal-to-noise ratio and reduces systematic uncertainty, thereby enabling high-precision absolute calibration for the sub-Hz CHRONOS torsion-bar gravitational wave detector.

Yuki Inoue, Daiki Tanabe, Vivek Kumar2026-02-24⚛️ gr-qc

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