gr-qc papers | Gist.Science

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.

Covariant cosmography in the presence of local structures: comparing exact solutions and perturbation theory

This paper investigates whether observed local cosmic expansion anisotropies can be explained by an off-center observer in the Lemaître-Tolman-Bondi framework by comparing exact relativistic luminosity distances with covariant cosmographic approximations and linear perturbation theory to establish a consistent dictionary for interpreting large-scale gravitational field anisotropies beyond the standard FLRW model.

Maharshi Sarma, Christian Marinoni, Basheer Kalbouneh, Chris Clarkson, Roy Maartens2026-03-10🔭 astro-ph

Information paradox and island of covariant black holes in LQG

This paper investigates the information paradox in four-dimensional covariant black holes within Loop Quantum Gravity, revealing that while two distinct solutions exhibit contrasting evaporation dynamics, the application of the island prescription to the first solution successfully recovers unitarity by suppressing late-time entropy growth through the influence of the LQG parameter.

Yongbin Du, Jia-Rui Sun, Xiangdong Zhang2026-03-10⚛️ gr-qc

Constraining the gravitational-wave emission of core-collapse supernovae with ground-based detectors

Using cross-correlation data from Advanced LIGO and Advanced Virgo during their third observing run, this study establishes a $95\%$ credibility upper limit of $0.01~M_\odot c^2$ on the gravitational-wave energy emitted by core-collapse supernovae, representing a two-order-of-magnitude improvement over previous constraints and suggesting that third-generation detectors will likely detect individual supernova events before the gravitational-wave background.

Jingwang Diao, Xingjiang Zhu2026-03-10🔭 astro-ph

The frame-dragging vector potential on galaxy scales from Dark-Matter-only Newtonian $N$ -body simulations

Using Dark-Matter-only $N$ -body simulations from the IllustrisTNG project, this study computes the frame-dragging gravito-magnetic vector potential on galactic scales, finding it to be two orders of magnitude larger than perturbation theory predicts yet remaining a subdominant $0.1\% \sim 1\%$ effect that does not significantly alter the non-linear dynamics of cosmic structures within the $\Lambda$ CDM model.

William Beordo, Marco Bruni, Cristian Barrera-Hinojosa, Mariateresa Crosta2026-03-10🔭 astro-ph

Gravitational Noether-Ward identities for scalar field

This paper establishes that for Einstein's gravity coupled to a massive, non-minimally coupled quantum scalar field, each term in the equation of motion for metric perturbations and each necessary renormalization counterterm independently satisfies a Noether-Ward identity, ensuring the overall transversality of the equation regardless of the specific definition used for the metric perturbation.

Tomislav Prokopec2026-03-10🔭 astro-ph

Limits of vacuum-template subtraction for LISA massive black hole binary sources in realistic environments

This paper demonstrates that while gravitational wave dephasing caused by gas accretion in massive black hole binaries will likely bias the inference of other LISA signals due to imperfect vacuum-template subtraction, the resulting residual is unlikely to be confidently distinguished from instrumental noise as a stochastic signal.

Lorenz Zwick2026-03-10🔭 astro-ph

Critical collapse of a massive scalar field in semi-classical loop quantum gravity

Numerical simulations of massive scalar field collapse within two semi-classical loop quantum gravity frameworks reveal that critical phenomena remain consistent with classical general relativity, exhibiting type II behavior for small masses and type I behavior with a finite minimum black hole mass for large masses, indicating that semi-classical LQG corrections have a negligible impact on these dynamics.

Li-Jie Xin, Xiangdong Zhang2026-03-10⚛️ gr-qc

Torsion-Induced Quantum Fluctuations in Metric-Affine Gravity using the Stochastic Variational Method

This review paper demonstrates that spatial torsion in Metric-Affine Gravity induces non-linear quantum fluctuations affecting spinless degrees of freedom through the Stochastic Variational Method, revealing a competitive interplay with Levi-Civita curvature and a structural parallelism with information geometry.

Tomoi Koide, Armin van de Venn2026-03-10⚛️ quant-ph

Constraining $β$ -Exponential Inflation with the latest ACT observations

This paper demonstrates that the $\beta$ -exponential inflationary potential, particularly when augmented with a small non-minimal coupling, successfully reconciles the higher scalar spectral index indicated by recent ACT and DESI observations with current CMB constraints by predicting a spectral tilt larger than universal attractor models while suppressing the tensor-to-scalar ratio.

Jureeporn Yuennan, Farruh Atamurotov, Salvatore Capozziello, Phongpichit Channuie2026-03-10⚛️ gr-qc

From Bertotti--Robinson to Vacuum: New Exact Solutions in General Relativity via Harrison and Inversion Symmetries

This paper constructs new accelerating vacuum solutions in General Relativity by applying Harrison and Inversion symmetries to electrovacuum configurations, demonstrating how external electromagnetic fields can be removed to leave non-trivial gravitational backreactions, including a new two-parameter extension of the Schwarzschild–Levi-Civita geometry and a stationary generalization.

José Barrientos, Adolfo Cisterna, Amaro Díaz, Keanu Müller2026-03-10⚛️ hep-th

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