⚛️ Category

gr-qc

3784 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.

⚛️ general relativity

Revealing Galactic dust beneath the cosmic infrared background anisotropies with Wavelet Phase Harmonics

This paper introduces a novel component-separation algorithm using Wavelet Phase Harmonics statistics to successfully isolate Galactic dust emission from cosmic infrared background anisotropies in Planck 353 GHz data across various high-latitude sky regions, outperforming standard template-fitting methods while preserving the statistical correlation between dust and neutral hydrogen column densities.

Srijita Sinha (School for Physical Sciences, National Institute of Science Education and Research, HBNI Jatni, India, Ho (…)2026-08-27
⚛️ general relativity

Reconstructing f(R)f(R) gravity from generalized entropies: exact Lagrangians

This paper establishes a non-perturbative, branch-dependent framework for reconstructing exact metric f(R)f(R) gravity Lagrangians from generalized horizon entropies, demonstrating how specific entropy corrections translate into distinct curvature terms and providing a direct criterion for Dolgov-Kawasaki stability.

Ankit Anand, Sahil Devdutt, Kimet Jusufi, Ayan Chatterjee, Emmanuel N. Saridakis2026-08-27
⚛️ general relativity

Atmospheric Newtonian noise in torsion-balance measurements of the gravitational constant GG

This paper establishes a GUM-consistent framework to quantify atmospheric Newtonian noise in torsion-balance measurements of the gravitational constant GG, deriving spatial transfer functions for benchmark geometries to demonstrate that while current atmospheric contributions are below reference uncertainty levels, they become significant as systematic errors approach the part-per-million regime.

Jyotirmaya Mohanta, Yutaka Shikano2026-08-27
⚛️ general relativity

Torsion balances as operational probes of semiclassical gravity: Matched-filter bounds, torque-diffusion constraints, and quantum-noise benchmarks

This paper establishes a comprehensive framework for using calibrated torsion-balance spectra to constrain both deterministic and stochastic deviations from Newtonian gravity, deriving matched-filter bounds and torque-diffusion limits that link experimental data to semiclassical gravity searches without directly testing the full relativistic semiclassical Einstein equation.

Jyotirmaya Mohanta, Yutaka Shikano2026-08-27
🔬 physics

Constraints on Rastall gravity from current observational data

This paper investigates the cosmological implications of Rastall gravity by deriving its linear perturbation equations and comparing them with diverse observational datasets, revealing that while the model aligns better with low-redshift large-scale structure data by predicting slower structure growth than Λ\LambdaCDM, it fails to resolve the Hubble tension when a cosmological constant is included.

Mahnaz Asghari, Hooman Moradpour2026-08-26
⚛️ general relativity

Primordial spectra from modified Bekenstein-Hawking entropy law

This paper investigates how logarithmic corrections to the Bekenstein-Hawking entropy, arising from quantum gravity, modify the background of single-field slow-roll inflation and consequently shift the tilt and running of the scalar primordial spectrum as well as the tensor-to-scalar ratio and consistency relation, while preserving the standard Mukhanov-Sasaki evolution equation with a quantum-corrected effective frequency.

Marco de Cesare, Giulia Gubitosi, Varun Kushwaha2026-08-26