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.

Black Hole-Boson Star Binaries: Gravitational Wave Signals and Tidal Disruption

This paper presents a fully nonlinear numerical study of black hole-boson star binaries, demonstrating that using equilibrated initial data is crucial for accurate gravitational waveforms, that radiative efficiency in head-on collisions depends significantly on the scalar potential, and that appropriate self-interactions can suppress tidal disruption during inspiral, with important implications for building model-agnostic waveform templates for exotic compact objects.

Gareth Arturo Marks, Seppe J. Staelens, Ulrich Sperhake2026-04-09⚛️ gr-qc

Probing the Planck scale with quantum computation

This paper argues that commercial quantum computers projected to exceed 1600 logical qubits will operate beyond classical Planck-scale limits, providing a feasible experimental test to resolve the incompatibility between general relativity and quantum mechanics.

Boaz Katz, Shlomi Kotler2026-04-09⚛️ quant-ph

Joint Curvature and Growth Rate measurements with Supernova Peculiar Velocities and the CMB

This paper demonstrates that combining Type Ia supernova peculiar velocity measurements with CMB data allows for the simultaneous constraint of cosmic curvature, the growth rate of structure, and matter density, revealing hints of positive curvature and a resolution of the $H_0$ tension through negative curvature and suppressed structure growth when external distance ladder data is included.

Camilo Crisman, Miguel Quartin, João Rebouças2026-04-09🔭 astro-ph

Constraints on a fifth force from the stellar orbits around the central supermassive black hole of the Milky Way

This study utilizes Markov chain Monte Carlo simulations of the S2 star's orbit around the Milky Way's central supermassive black hole to constrain the strength and range of a potential fifth force within a Yukawa gravity model, finding that the resulting parameters are consistent with previous research and compatible with recent GRAVITY Collaboration measurements of Schwarzschild precession.

Predrag Jovanovic, Duško Borka, Vesna Borka Jovanovic2026-04-09🔭 astro-ph

Gauge Theoretic Signal Processing I: The Commutative Formalism for Single-Detector Adaptive Whitening

This paper introduces a geometric framework for adaptive whitening in gravitational-wave detectors by reformulating spectral factorization as parallel transport on a principal bundle, proving that the resulting flat connection ensures path-independent, hysteresis-free filter updates that unify static Wiener-Hopf theory with dynamic real-time control.

James Kennington, Joshua Black2026-04-09⚛️ gr-qc

Effective Improved-GUP Cosmology: Emergent FLRW Universe without a Bounce

This paper demonstrates that applying improved Generalized Uncertainty Principle (GUP) deformations to Ashtekar-Barbero variables in a spatially flat FLRW universe coupled to a massless scalar field resolves the classical singularity into a non-singular, emergent universe that coasts from a constant-volume state without a bounce, while an improved scheme with a momentum-dependent GUP parameter ensures a universal maximum energy density and faster convergence to classicality.

Saeed Rastgoo, Wilfredo Yupanqui2026-04-09⚛️ gr-qc

Tunnelling across a trapped region and out of a black hole

This paper demonstrates that a massless scalar field on a two-dimensional non-singular black hole spacetime exhibits a non-vanishing probability for particles to tunnel from the causally disconnected interior of the inner horizon to the exterior of the outer horizon, with the total probability asymptoting to a maximal value determined solely by the surface gravities of the two horizons.

Edward Wilson-Ewing2026-04-09⚛️ gr-qc

Traversable double-throat wormholes in a string cloud background

This paper constructs a new class of traversable double-throat wormhole solutions in a string cloud background, demonstrating that the inter-throat region can be supported by non-exotic matter while localizing Null Energy Condition violations to the throat vicinities.

Yvens Amaral, M. S. Cunha, C. R. Muniz, M. O. Tahim2026-04-09⚛️ gr-qc

Area bounds and gauge fixing: alternative canonical variables for loop gravity

This paper introduces alternative canonical variables for loop quantum gravity that explicitly link twisted geometries to frame and spinorial descriptions, thereby analytically proving a non-vanishing lower bound on total area evolution in the two-vertex model and simplifying gauge-fixing procedures for more general configurations.

Iñaki Garay, Sergio Rodríguez-González, Raül Vera2026-04-09⚛️ gr-qc

Spin-charge induced scalarization of Kerr-Newman black holes in the Einstein-Maxwell-scalar theory with scalar potential

This paper investigates the spin-charge-induced scalarization of Kerr-Newman black holes within Einstein-Maxwell-scalar theory, demonstrating through linear analysis and numerical simulations that these black holes become unstable and evolve into scalarized states when specific thresholds involving spin, charge, scalar mass, and coupling parameters are exceeded.

Xiang Luo, Meng-Yun Lai, Yun Soo Myung, Yi-Bin Huang, De-Cheng Zou2026-04-09⚛️ gr-qc

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