3256 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 argues that effective field theories with light scalars can achieve UV completion through classicalization, a mechanism relying on the synergy between Vainshtein and chameleon screening to generate semi-classical objects that resolve hierarchy problems via UV/IR mixing.
This paper utilizes a dual domain wall perspective and modular invariance to compute non-perturbative corrections in four-dimensional N=2 heterotic string vacua, resolving a strong coupling singularity and demonstrating a Randall-Sundrum-like interpolation between a visible 9-brane and a supersymmetric Anti-de Sitter vacuum.
This paper investigates the imaging signatures of dynamical thin-shell Schwarzschild spacetimes by analyzing null geodesic refraction and light travel time delays, revealing distinct features such as redshift cusps, V-shaped transfer functions, and the decoupling of photon spheres from observable photon rings that serve as practical tests for Israel junction conditions.
This paper derives the shockwave metric in four-dimensional Einstein-Maxwell effective field theory by boosting a charged black hole with leading-order corrections, demonstrating that unlike the neutral case, electrically charged shockwaves receive nontrivial EFT modifications and that a physically consistent, field-redefinition-invariant time delay for a probe photon requires accounting for both the corrected shockwave geometry and the probe's backreaction.
This paper generalizes Buchdahl's compactness limits to -dimensional Einstein gravity coupled to higher-curvature corrections in Quasi-topological theories, demonstrating that constant-density stars can be more compact than in standard Einstein gravity and that arbitrarily high curvatures may be reached unless additional energy conditions are imposed.
This paper presents a new, exact solution in Einstein's gravity that describes the cosmological embedding of static, spherically-symmetric objects, including black holes, within an FLRW universe while fully accounting for backreaction and ensuring the event horizon remains free of curvature singularities.
This paper investigates inflationary dynamics and scalar perturbations within a fractal cosmology framework characterized by a non-integer effective dimension, deriving generalized slow-roll parameters and a modified Mukhanov-Sasaki equation to show that comparison with Planck 2018 data constrains the fractal dimension to the range .
This paper embeds covariant gravitational radiation criteria into the gauge/gravity duality framework to establish a correspondence between bulk gravitational waves and boundary dissipative processes, ultimately deriving a Carrollian fluid description with natural entropy production in the flat limit.
This paper computes and compares the horizon multipole moments of a Kerr black hole using two distinct definitions—one for axisymmetric isolated horizons and another for generic non-expanding horizons—revealing that while both share properties with field multipoles, they yield different values for moments with degree (or in the small spin limit) and providing closed-form expressions for these quantities.
This paper clarifies a conflation between the existence of alternative geometries and Reichenbach's universal equivalence claim to demonstrate that, contrary to recent criticisms, there is no "rich" no-go theorem invalidating Reichenbach's theorem , while proposing a constructive framework for rigorously exploring alternative spacetime theories.