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.

Inverting no-hair theorems: How requiring General Relativity solutions restricts scalar-tensor theories

This paper investigates how imposing the existence of specific General Relativity solutions, such as Schwarzschild or de Sitter black holes with stealth scalar hair, restricts the parameter space of general quadratic and cubic scalar-tensor theories, revealing that while requiring all such solutions eliminates odd-parity deviations from GR, less restrictive scenarios allow for specific deviations, stability constraints, and modified gravitational wave speeds.

Hajime Kobayashi, Shinji Mukohyama, Johannes Noller, Sergi Sirera, Kazufumi Takahashi, Vicharit Yingcharoenrat2026-05-01⚛️ gr-qc

On the geometry of synthetic null hypersurfaces

This paper establishes a synthetic framework for null hypersurfaces in non-smooth spacetimes by defining a synthetic null energy condition via optimal transport, which generalizes classical results to singular settings and enables the proof of Hawking's area theorem and Penrose's singularity theorem in continuous and topological causal spaces.

Fabio Cavalletti, Davide Manini, Andrea Mondino2026-05-01🔢 math-ph

Photon counting readout for detection and inference of gravitational waves from neutron star merger remnants

This paper proposes and demonstrates through simulations that a photon-counting readout scheme, which quantizes signals and noise into discrete photon distributions, can effectively detect rare, low signal-to-noise ratio gravitational waves from neutron star merger remnants and significantly improve constraints on neutron star radii compared to traditional homodyne techniques.

Ethan Payne, Lee McCuller, Katerina Chatziioannou2026-05-01⚛️ gr-qc

Observational appearance and photon rings of non-singular black holes from anisotropic fluids

This study investigates the observational signatures of non-singular black holes in Eddington-inspired Born-Infeld gravity with anisotropic fluids, concluding that while their photon ring structures exhibit theoretical deviations from Schwarzschild counterparts, current observational and modeling uncertainties prevent their distinction without incorporating dynamic features like hot-spots or gravitational wave signals.

David Díaz-Guerra, Angel Rincon, Diego Rubiera-Garcia2026-05-01⚛️ gr-qc

A Nonlocal Realization of MOND that Interpolates from Cosmology to Gravitationally Bound Systems

This paper presents a single nonlocal gravity model derived from quantum corrections that successfully interpolates between reproducing cosmological phenomena typically attributed to dark matter and realizing Modified Newtonian Dynamics (MOND) in gravitationally bound systems.

C. Deffayet (Ecole Normale Superieure), R. P. Woodard (U. of Florida)2026-05-01⚛️ gr-qc

Effective dynamics of Janis-Newman-Winicour spacetime

This paper investigates the effective dynamics of the Janis-Newman-Winicour spacetime within loop quantum gravity, demonstrating that while the constant-parameter ( $\mu_0$ ) scheme resolves classical singularities through quantum bounces, an alternative scheme based on Dirac observables fails to provide a globally valid effective theory due to the emergence of new singularities.

Faqiang Yuan, Shengzhi Li, Zhen Li, Yongge Ma2026-05-01⚛️ gr-qc

Generalized Carter & Rüdiger Constants of $\sqrt{\text{Kerr}}$

This paper demonstrates that for a charged spinning test particle moving in the electromagnetic field of a charged spinning ring-disk singularity (the $\sqrt{\text{Kerr}}$ limit), two hidden constants of motion analogous to the Carter and Rüdiger constants exist if and only if the particle's multipole moments are constrained by specific Wilson coefficients corresponding to the spin-exponentiation of effective Compton amplitudes up to second order in spin.

Christopher de Firmian, Justin Vines2026-05-01⚛️ gr-qc

Positive mass theorem for initial data sets with arbitrary ends

This paper establishes the positive mass theorem for complete asymptotically hyperbolic manifolds satisfying the dominant energy condition by proving a quantitative shielding theorem for their energy-momentum vectors, building upon spectral PSC concepts and extending results to manifolds with asymptotically locally hyperbolic ends under certain symmetries.

Tin-Yau Tsang2026-05-01🔢 math

Geodesically Complete Curvature-Bounce Inflation

This paper presents a geodesically complete, nonsingular closed FRW cosmology within ordinary general relativity that transitions from a curvature-supported bounce to slow-roll inflation via a single canonical scalar field, satisfying the Null Energy Condition throughout while yielding inflationary observables consistent with current constraints.

Damien A. Easson2026-05-01🔭 astro-ph

Bound-State Resonances of Schwarzschild-de Sitter Black Holes: Analytic Treatment

This paper analytically derives the resonance energies for Schwarzschild-de Sitter black holes, revealing that unlike the infinite, delocalizing spectrum of asymptotically flat Schwarzschild black holes, the presence of a cosmological constant restricts bound-state resonances to a finite number of levels, thereby preventing infinite delocalization.

Qi-Dong Chen, Chong-Bin Chen, Guo-Qing Huang, Fu-Wen Shu, Tieguang Zi2026-05-01⚛️ gr-qc

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