⚛️ Category

gr-qc

3285 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.

Spontaneous scalarization of neutron stars in teleparallel gravity with derivative torsional coupling

This paper investigates neutron star configurations in a teleparallel gravity model with derivative torsional coupling and matter interaction, revealing that spontaneous scalarization occurs only within specific density ranges and is significantly influenced by the equation of state and coupling strength, thereby offering potential observational tests through stellar radius and rotational measurements.

Youcef Kehal, Khireddine Nouicer2026-03-25⚛️ gr-qc

Thermodynamic constraints and future singularities in Unimodular Gravity driven by phantom and non-phantom fluids

This paper demonstrates that in unimodular gravity, time-dependent energy diffusion can induce effective phantom behavior and Big Rip singularities even for non-phantom fluids with positive entropy production, revealing a novel mechanism for future cosmological singularities absent in standard General Relativity.

Norman Cruz, Samuel Lepe, Guillermo Palma, Miguel Cruz2026-03-25⚛️ gr-qc

Dark energy stars from the modified Chaplygin gas: C−I−Λ−Eg−fC-I-\Lambda-E_g-f universal relations

This paper investigates universal relations among macroscopic properties of dark energy stars modeled by modified Chaplygin gas, revealing that while they mimic quark stars in C−I−Λ−fC-I-\Lambda-f correlations, they can be distinctly distinguished from quark stars through gravitational binding energy relations, thereby enabling refined forecasts of canonical compact star properties consistent with GW170817 constraints.

Krishna Pada Das, Juan M. Z. Pretel2026-03-25⚛️ gr-qc

Virtual absorption modes of Schwarzschild-de Sitter spacetimes in semi-open systems

This paper investigates virtual absorption modes in Schwarzschild-de Sitter spacetime under semi-open boundary conditions, demonstrating through numerical analysis that these modes correspond to total transmission states which, when excited, lead to coherent perfect absorption and serve as spectral signatures for exotic compact objects.

Liang-Bi Wu, Yu-Sen Zhou, Zhe Yu, Ming-Fei Jia, Li-Ming Cao2026-03-25⚛️ gr-qc

In-orbit Test of the Weak Equivalence Principle with Atom Interferometry

Researchers aboard the China Space Station achieved the first in-orbit quantum test of the Weak Equivalence Principle using a dual-species atom interferometer, improving measurement precision by three orders of magnitude to a test uncertainty of 2.8×10⁻⁸.

Dan-Fang Zhang, Jing-Ting Li, Wen-Zhang Wang, Wei-Hao Xu, Jia-Yi Wei, Xiao Li, Yi-Bo Wang, Dong-Feng Gao, Jia-Qi Zhong, Biao Tang, Lin Zhou, Run-Bing Li, Huan-Yao Sun, Qun-Feng Chen, Lei Qin, Mei-zhen (…)2026-03-25🔬 physics.atom-ph

Revisiting Constraints on Primordial Curvature Power Spectrum from PBH Abundances

This paper derives updated constraints on the amplitude of the primordial curvature power spectrum from primordial black hole abundances by systematically comparing Press-Schechter and peak theory formalisms, revealing that non-spherical collapse effects and the choice of statistical method significantly influence the inferred limits, particularly for broad power spectra.

Ashu Kushwaha, Teruaki Suyama2026-03-25⚛️ hep-th

Low-Frequency Stochastic Gravitational-Wave Background in Gaia DR3 catalogue

This paper investigates the detection of low-frequency stochastic gravitational-wave backgrounds using Gaia DR3 quasar proper motions, comparing Vector Spherical Harmonics and Hellings-Downs curve methods to establish a strain sensitivity limit of approximately 10−1110^{-11} and forecast improvements for future data releases.

V. Akhmetov, L. Filipello, M. Crosta, M. G. Lattanzi, B. Bucciarelli, U. Abbas, F. Santucci2026-03-25⚛️ gr-qc