3784 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.
This paper investigates the cosmological viability of hairy black holes formed via spontaneous symmetry breaking in Einstein-Scalar-Gauss-Bonnet theory and concludes that, to avoid tachyonic instabilities during the post-inflationary phase, only ultralight primordial black holes with masses of a few grams can successfully develop scalar hair.
This study constrains the charge and Kalb-Ramond symmetry-breaking parameters of a charged black hole using Event Horizon Telescope observations of Sagittarius A* and subsequently demonstrates how these parameters jointly influence the radiative efficiency of thin accretion disks and the equilibrium topology of thick tori, offering potential observational signatures for Kalb-Ramond gravity.
This paper demonstrates that mild three-dimensional anisotropies in vacuum general relativity can drive the formation of marginally outer trapped surfaces by increasing the generalized boundary mean curvature beyond Yau's geometric threshold, thereby achieving black hole formation through global geometric effects without requiring short-pulse gravitational radiation.
This paper develops a unified, model-independent framework for analyzing photon frequency shifts in generic static, spherically symmetric spacetimes, extending the formalism to include peculiar motion and plasma effects while applying it to various regular black holes, black bounces, and scalar-hair compact objects to demonstrate a common spectroscopic language for distinguishing these horizonless and deformed geometries.
This paper demonstrates that thermal energy fluctuations of cosmological horizons stabilize to a constant value in the asymptotic de Sitter limit across various gravitational theories, including Gauss-Bonnet, Lovelock, and quantum-deformed models, thereby establishing a unified thermodynamic picture where entropy maximization and holographic equipartition define the universe's equilibrium end state.
This paper investigates the relativistic collapse of initially static, shear-free radiating stars in the presence of electromagnetic fields and a cosmological constant, utilizing phase plane analysis to demonstrate that fold bifurcations arise from nonzero charge and the cosmological constant, thereby providing a comprehensive understanding of the system's temporal evolution and extending previous results.
This paper presents evidence that a superradiance-informed spin distribution model, driven by ultralight scalar bosons with a mass of approximately , successfully explains the observed mass-spin correlations in merging binary black holes across the Gravitational-Wave Transient Catalogs, with statistical significance increasing from GWTC-3.0 to GWTC-5.0.
This paper presents an exact, self-gravitating solution for black-hole jets that unifies the hole, disk, and magnetosphere into a single Reissner–Nordström geometry, revealing that steady jets are impossible, jet power is capped at by a shared extremality budget with spin, and a maximally spinning black hole ultimately decays by converting 9.2% of its mass into finite jet output.
This paper demonstrates that exact WKB methods provide a powerful and systematically improvable framework for analytically computing the zero-damped mode spectrum of near-extremal Reissner--Nordström black holes with higher accuracy than previous studies.
This paper presents 3D general relativistic magnetohydrodynamic simulations of a rapidly spinning, equal-mass binary black hole system accreting from a magnetized circumbinary disk, revealing how magnetic flux transport drives powerful, alternating dual jets and how mini-disk thermodynamics influences jet luminosity and periodicity.