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.
This paper establishes a novel connection between synthetic curvature bounds and the causal character of maximizers to prove that low-regularity spacetime inextendibility implies unbounded curvature, a result that significantly strengthens and complements previous findings by Grant, Kunzinger, and Sämann.
This paper determines the spectra of codimension-2 horizon edge degrees of freedom for gravity and higher-spin fields in de Sitter and Nariai spacetimes, revealing universal shift symmetries and a novel symmetry-breaking structure in one-loop partition functions with a positive cosmological constant.
This paper investigates the detectability of gravitational wave modes, specifically the elusive w-modes from spinning neutron stars, by third-generation ground-based detectors like the Cosmic Explorer and Einstein Telescope, concluding that these future observatories will be capable of observing them with a good signal-to-noise ratio.
This paper investigates second-order bi-scalar-vector-tensor field equations in four-dimensional space that satisfy charge conservation and reduce to Maxwell's equations in flat space, ultimately concluding that a single Lagrangian cannot generate all such equations while offering implications for Higgs-driven electromagnetic generation in the early Universe and the impracticality of coupling bi-scalar fields to gauge-tensor fields.
This paper derives a coordinate transformation from Schwarzschild-like to isotropic coordinates for a broad class of static, spherically symmetric spacetimes containing multiple anisotropic fluid sources, thereby removing spatial pathologies at the horizon and providing a robust framework for numerical relativity, perturbation theory, and non-vacuum black hole phenomenology.
This paper examines the collapse of an isolated dust cloud using expansion functions to demonstrate that an apparent horizon exists and covers the gravitational singularity in regions far from it, though the method's applicability is limited near the singularity where quantum effects become significant.
This paper presents a model-independent reconstruction of the quintessence scalar field's potential and kinetic energy using DESI DR2 and Pantheon+ data via Gaussian processes, revealing a thawing dark energy scenario with a monotonically decreasing potential and clarifying that apparent negative kinetic energy values are statistical artifacts rather than new physics.
This paper demonstrates that while local perturbations to an imperfect fluid's geometry instantaneously break its newly discovered four-velocity gauge-like symmetry, they simultaneously transform it into a new symmetry characterized by the tilting of local orthogonal planes of symmetry.
This paper resolves the apparent violation of the first law in nonsingular black hole thermodynamics by using 2D dilaton gravity to derive a consistent energy formula via the Iyer-Wald formalism, demonstrating that previous discrepancies stemmed from incorrect energy choices.
This paper analyzes the causal structure and geodesic dynamics of horizonless JMN-1 and JNW spacetimes to demonstrate how their distinct singularity types and effective repulsive behaviors produce unique strong-field lensing and shadow signatures that could be observationally distinguished from black holes by instruments like the Event Horizon Telescope.