3919 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 utilizes a core-envelope model with pseudo-spheroidal and spherically symmetric space-time geometries to derive equations of state for superdense stars, leading to a classification of compact objects into three distinct categories based on their mass-radius relationships and other physical properties.
This study investigates the stability of relativistic core-envelope stellar models with anisotropic fluids and demonstrates that the distortion energy accumulated through anisotropy-induced density perturbations can reach magnitudes comparable to gamma-ray bursts, thereby suggesting a potential physical connection between starquakes in self-bound compact stars and gamma-ray bursts.
This paper employs the differential form technique and the Newman-Penrose-Jogia-Griffiths formalism within Einstein-Cartan theory to analyze Morris-Thorne wormholes supported by a Weyssenhoff fluid, deriving the spin density and examining the energy conditions at the wormhole throat.
This study shows that modernized and future gravitational wave detector networks, particularly high-frequency designs, have the potential to detect rotational instabilities in remnants of binary neutron star mergers by analyzing re-excited --modes in post-merger waveforms.
This paper constructs and analyzes two stable, spherically symmetric thin-shell gravastar models within a BTZ geometry incorporating minimum length effects via distinct distribution functions, while also investigating their thermodynamic properties and the stability of the corresponding minimum-length BTZ black hole.
This paper presents a Hamiltonian analysis of pre-geometric gauge theories where Einstein-Cartan gravity emerges via spontaneous symmetry breaking, demonstrating the recovery of canonical General Relativity in the infrared limit while characterizing the ultraviolet degrees of freedom and exploring pathways for UV completion through extended BF formulations and a generalized Wheeler-DeWitt equation.
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.