⚛️ Category

gr-qc

3256 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.

Coalescing Compact Binary Parameter Estimation with Gravitational Waves in the Presence of non-Gaussian Transient Noise

This study quantifies how non-Gaussian transient noise glitches in LIGO detectors bias the parameter estimation of compact binary coalescence signals, revealing significant distortions in mass, spin, and sky position—particularly when glitches occur shortly before the merger—and establishing time-separation thresholds to identify when glitch subtraction is necessary for unbiased results.

Yannick Lecoeuche, Jess McIver, Alan M. Knee, Rhiannon Udall, Katie Rink, Sophie Hourihane, Simona J. Miller, Katerina Chatziioannou, TJ Massinger, Derek Davis2026-04-10⚛️ gr-qc

Unveiling Inner Shadows and Polarization Signatures of Rotating Einstein-Gauss-Bonnet Black Holes

This paper numerically investigates the shadow and polarization images of rotating Einstein-Gauss-Bonnet black holes using backward ray-tracing, demonstrating that while the GB coupling constant and spin parameter affect the inner shadow's size and shape differently, the synergistic analysis of both image types offers a more powerful observational tool for probing spacetime structures than either method alone.

Bing-Bing Chen, Chen-Yu Yang, Deyou Chen, Ke-Jian He2026-04-10⚛️ gr-qc

Rindler Physics with a UV Cutoff on the Lattice

This paper demonstrates that while introducing a UV cutoff on a lattice breaks the exact thermality of the Minkowski vacuum with respect to the local Rindler Hamiltonian and reveals a reflected component at a stretched horizon, the Unruh effect remains operationally valid for distant observables in the continuum limit, highlighting a fundamental inequivalence between global Minkowski and local Rindler descriptions in UV-regulated theories.

Seiken Chikazawa, Seiji Terashima2026-04-10⚛️ hep-th

Scalable continuous gravitational wave detection in PTA data with non-parametric red noise suppression and optimal pulsar selection

This paper introduces a computationally efficient frequentist method for detecting continuous gravitational waves in Pulsar Timing Array data that combines adaptive spline fitting for non-parametric red noise suppression with optimal pulsar selection, achieving accuracy comparable to Bayesian analysis while reducing computation time from days to hours to enable scalable searches for next-generation large-scale arrays.

Yi-Qian Qian, Yan Wang, Soumya D. Mohanty, Siyuan Chen2026-04-10⚛️ gr-qc

Observational Quantities in Quasi-Newtonian Descriptions of Cosmological Space-Times

This paper develops a quasi-Newtonian framework for analyzing cosmological space-times with shear-free foliations to derive non-perturbative expressions for observational quantities like distance and redshift, thereby offering a new method to interpret complex relativistic models and investigate current cosmological tensions through Newtonian degrees of freedom.

Asta Heinesen, Davide Fontana, Timothy Clifton2026-04-10⚛️ gr-qc

Detecting Chiral Gravitational Wave Background with a Dipole Pulsar Timing Array

This paper proposes a dipole pulsar timing array (dPTA) system that overcomes the parity violation insensitivity of conventional arrays by utilizing cross-correlation-derived overlap reduction functions, thereby enabling the detection of chiral gravitational wave backgrounds and extending the observable frequency range from nanohertz to microhertz.

Baoyu Xu, Hanyu Jiang, Rong-Gen Cai, Misao Sasaki, Yun-Long Zhang2026-04-10⚛️ gr-qc

Hard to shock DBI: wave propagation on planar domain walls

This paper demonstrates that while generic wave propagation on planar domain walls described by the scalar DBI model remains free of shock singularities in the hyperbolic regime across various physically relevant scenarios, the formation of caustics is ultimately driven by the loss of hyperbolicity, leading to cusp profiles influenced by the model's non-trivial characteristic structure.

E. Babichev, B. Gafarov, S. Ramazanov, M. Valencia-Villegas2026-04-10⚛️ hep-th