⚛️ Category

gr-qc

3213 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.

Formation of shell-crossing singularities in effective gravitational collapse models with bounded and unbounded polymerizations

This paper demonstrates that while shell-crossing singularities are unavoidable in effective LTB models with bounded polymerization functions (such as the LQG-inspired asymmetric bounce), they can be avoided in models with unbounded polymerization functions (like Bardeen and Hayward) for inhomogeneous, decreasing dust profiles, mirroring the behavior of classical gravitational collapse.

Francesco Fazzini, Kristina Giesel, Eric Rullit2026-04-16⚛️ gr-qc

Gravitational emissions and light curves of quasi-periodic orbits in Schwarzschild spacetime embedded in a Dehnen-type dark matter halo

This study investigates strictly closed timelike orbits in a Schwarzschild spacetime embedded within a Dehnen-type dark matter halo, demonstrating how dark matter parameters amplify orbital scales and induce phase lags in gravitational waves while creating distinct signatures in electromagnetic light curves to enable multi-messenger detection of dark matter properties.

Shijie Tan, Chunhua Jiang, Dan Li, Shiyang Hu, Chen Deng, Wenbin Lin2026-04-16⚛️ gr-qc

Dark energy, spatial curvature, and star formation efficiency from JWST photometric and spectroscopic high-redshift galaxies

This study employs a full Bayesian analysis of JWST high-redshift galaxy data to demonstrate that the observed overabundance of massive galaxies is best explained by enhanced star formation efficiency rather than deviations from the standard Λ\LambdaCDM cosmological model, as varying dark energy and spatial curvature parameters yields no evidence for new physics.

Leonardo Comini, Sunny Vagnozzi, Abraham Loeb2026-04-16⚛️ gr-qc

Robust parameter inference for Taiji via time-frequency contrastive learning and normalizing flows

This paper presents a robust, deep-learning-based amortized inference framework for the Taiji space-based gravitational-wave detector that combines conditional normalizing flows, time-frequency contrastive learning, and a neural glitch generator to achieve accurate and well-calibrated parameter estimation for massive black hole binaries even in the presence of transient noise artifacts.

Tian-Yang Sun, Bo Liang, Ji-Yu Song, Song-Tao Liu, Shang-Jie Jin, He Wang, Ming-Hui Du, Jing-Fei Zhang, Xin Zhang2026-04-16⚛️ gr-qc

Bipartite entanglement harvesting with multiple detectors

This paper demonstrates that bipartite entanglement harvesting from a quantum vacuum using multiple Unruh-DeWitt detectors can be efficiently analyzed via a linearly scaling submatrix, revealing that increasing the number of detectors not only maximizes harvested entanglement in specific configurations but also broadens the operational ranges for energy gaps and separations.

Santeri Salomaa, Esko Keski-Vakkuri, Sergi Nadal-Gisbert2026-04-16⚛️ hep-th

Revisiting Thermodynamics of the Hayward Black Holes and Exploring Binary Merger Bounds

This paper revisits the thermodynamics of Hayward black holes in asymptotic flat spacetime to derive a novel entropy formula with logarithmic corrections, analyze their phase structure, and establish bounds on the final mass following the head-on merger of two equal-mass black holes while ensuring the validity of the second law of thermodynamics.

Neeraj Kumar, Ankur Srivastav, Phongpichit Channuie2026-04-16⚛️ gr-qc

Universal analytic dependence of the stress-energy tensor at thermodynamic equilibrium in curved space-time

This paper demonstrates that the analytic part of the stress-energy tensor's asymptotic expansion at thermodynamic equilibrium in curved spacetime is universal across various geometries and quantum field theories, depending solely on covariant derivatives of the Killing four-temperature and metric tensor, while non-universal contributions arise from non-analytic terms linked to specific boundary conditions or global spacetime properties.

F. Becattini (University of Florence,INFN), F. Palli (University of Florence,INFN)2026-04-16⚛️ hep-th

Singular Solutions of the Tolman Oppenheimer Volkoff Equation with a Cosmological Constant Classification and Properties

This paper classifies singular solutions of the Tolman-Oppenheimer-Volkoff equation with a cosmological constant by integrating from an outer boundary, revealing that singular configurations dominate the solution space, possess a universal geometric structure yielding bounded-acceleration complete spacetimes, and exhibit four distinct classes with cosmological horizons when Λ≠0\Lambda \neq 0.

Christos Dounis, Charis Anastopoulos2026-04-16⚛️ gr-qc