2558 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 derives and analyzes pre-geometric Einstein-Cartan field equations, demonstrating how spontaneous symmetry breaking leads to the emergence of spacetime metric structure and standard gravitational equations, while presenting an exact solution that models a pre-geometric de Sitter universe and potentially resolves the Big Bang singularity.
This work investigates alternative geometric cosmological models featuring an infinite tower of higher-order curvature invariants and employs cosmic chronometers, Type Ia supernovae, and globular cluster age data to demonstrate that while certain variants are ruled out, specific cases of the GILA model successfully account for current observational constraints.
This paper investigates the conditions for energy positivity in superrenormalizable polynomial gravity models with six and eight derivatives, demonstrating that while these theories suffer from ghost and tachyonic states, their leading UV energy contributions in the tensor sector are positively defined, unlike in fourth-order gravity, and extends this analysis to the scalar sectors.
This contribution introduces GWKokab, a JAX-based framework that employs normalizing flows to enable scalable and computationally efficient inference of properties of multiple gravitational-wave subpopulations, successfully recovers synthetic parameters, and reproduces results from previous studies on eccentricity and mass distributions.
This paper extends the formalism of scale-invariant symmetry reduction to singular Lagrangian systems of both particles and fields by utilizing the De Donder-Weyl multisymplectic framework to construct dynamically equivalent frictional theories, with applications to physical models and implications for classical General Relativity.
This article proposes a mixed Linear-Quadratic-Gaussian and control framework to establish benchmark cost functions and compute optimal, robust feedback strategies that minimize bilinear noise in gravitational wave detectors, thereby improving current observatories and guiding the design of future facilities.
This paper generalizes the Antonini-Sasieta-Swingle construction of 3D holographic cosmologies by introducing a gluing procedure that adds arbitrary AdS tubes to heavy-particle wormhole solutions, enabling the creation of homogeneous and isotropic models while identifying conditions under which these cosmological saddles dominate the Euclidean path integral over alternative configurations.
This paper investigates static and dynamical spherically symmetric black holes within the Gravity from Entropy framework, demonstrating that the theory yields corrections to the Schwarzschild metric, aligns with current astrophysical observations, and predicts both a standard Hawking-like mass loss at intermediate scales and a constant background evaporation rate for large black holes due to inherent entropic leakage.
This paper numerically demonstrates that in Palatini modified gravity with a non-minimal scalar-Ricci coupling, oscillons form during the preheating phase of inflation, leading to a prolonged period of oscillon domination and the generation of ultra-high frequency primordial gravitational waves detectable by future experiments.
This paper presents a general algorithm for deriving series solutions to the Tolman-Oppenheimer-Volkoff equations based on the equation of state, utilizing Padé approximants to obtain closed-form approximations for stellar mass and radius while extending the formalism to piecewise equations of state.