⚛️ Category

gr-qc

4428 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

Acoustic Schwarzschild-like black hole and analogous Hawking radiation in Einstein-bumblebee gravity

This paper derives an acoustic Schwarzschild-like black hole within Einstein-bumblebee gravity using Gross-Pitaevskii theory, revealing that while both gravitational and acoustic Hawking temperatures depend on the Lorentz violation coupling constant, the acoustic temperature and grey-body factors exhibit a distinct, experimentally valuable dependence on the tuning parameter ξ\xi that increases with ξ\xi but decreases with the coupling constant.

Chikun Ding, Yuebing Zhou, Yu Shi, Yuehua Xiao, Jiliang Jing2026-10-27
⚛️ phenomenology

Dark Matter phase space distribution under a fully relativistic treatment. Eddington inversion according to general relativity

This paper presents a fully relativistic extension of the Eddington inversion method to reconstruct the dark matter phase-space distribution in static, spherically symmetric spacetimes, demonstrating that relativistic effects significantly alter velocity distributions and capture rates near supermassive black holes compared to classical Newtonian predictions.

Jaime Hoefken Zink, Pellegrino Piantadosi2026-10-27
⚛️ general relativity

Observational constraints on a non-minimally coupled scalar field in non-metricity gravity with an extra degree of freedom

This paper demonstrates that non-minimally coupled scalar field models in non-metricity gravity with an extra dynamical degree of freedom are cosmologically viable, as they successfully reproduce standard Λ\LambdaCDM-like evolution and match recent observational data from DESI BAO, supernovae, and cosmic chronometers.

Saddam Hussain, Ghulam Murtaza, Avik De2026-10-27
🔭 astrophysics

Lunar tidal response-induced clock frequency variations on the Moon

This paper investigates how lunar tidal response-induced fractional frequency shifts between clocks on the Moon, analyzed via Keplerian expansions for elliptical orbits, reveal that longitude differences affect both amplitude and phase while latitude differences affect only amplitude, ultimately quantifying a significant daily clock discrepancy between lunar and Earth-based clocks to inform future lunar timekeeping and synchronization systems.

Hongbin Zhang, Baocheng Zhang2026-10-27
⚛️ general relativity

Observational constraints on viscous free-γγ fluid in f(Q)f(Q) gravity

This paper investigates the late-time cosmological dynamics of a bulk viscous fluid with a generalized barotropic equation of state within exponential f(Q)f(Q) gravity, demonstrating that the model is consistent with current observational data and successfully reproduces the transition from a matter-dominated decelerating epoch to a stable, accelerated de Sitter expansion.

Simran Arora, Sai Swagat Mishra, P. K. Sahoo2026-10-27
🔬 physics

Gravitational-Wave Detector for Postmerger Neutron Stars: Beyond the Quantum Loss Limit of the Fabry-Perot-Michelson Interferometer

This paper proposes a novel "L-resonator" interferometer configuration for a 25 km gravitational-wave detector that overcomes optical loss limitations at high frequencies, demonstrating a 3 to 7-fold improvement in signal-to-noise ratio for post-merger neutron star signals compared to existing third-generation designs and enabling a confident detection rate of 1 to 30 events per year.

Teng Zhang, Huan Yang, Denis Martynov, Patricia Schmidt, Haixing Miao2026-10-26