2693 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 radial oscillations in nucleonic, quarkyonic, and hybrid neutron stars by incorporating out-of-equilibrium chemical effects, revealing that this approach avoids physical singularities, elucidates dynamic mode responses, and extends stable stellar branches to accommodate higher-mass configurations like PSR J0740+6620.
This study investigates the impact of Energy-Momentum Squared Gravity (EMSG) on neutron star properties across various equations of state, utilizing numerical solutions and observational constraints to determine how the theory's free parameter influences mass-radius relations, phase transitions, and the fundamental-mode (-mode) oscillation frequency.
This paper proposes a Higgs inflation model within the Two-Measure Theory extension of the Standard Model, demonstrating how a small non-minimal coupling constant combined with a specific algebraic constraint on the volume measure ratio generates an effective potential that satisfies CMB observations, naturally triggers spontaneous symmetry breaking post-inflation, and resolves initial condition problems while allowing for a fermion preheating phase.
This paper presents a quantum response framework for momentum-space gravity in dissipative multiband systems that unifies quantum geometry and equations of motion through interband Weyl transformations, introduces a three-state quantum geometric tensor for classifying nonlinear responses, and identifies a dual quantum geometric drag force as an entropic source for Einstein field equations.
This study demonstrates that Energy-Momentum Squared Gravity significantly alters the curvature profiles of neutron stars and produces distinct discontinuities at hadron-quark phase transitions, offering potential observational signatures for detecting exotic core phases in modified gravity scenarios.
By applying Hartle-Thorne spacetimes to study both geodesic and fluid flows, this paper demonstrates that the interplay between relativistic and classical precession creates non-monotonic dependencies on neutron star angular momentum, explaining why slow and fast rotators can exhibit identical precession frequencies and why no correlation exists between observed low-frequency quasiperiodic oscillations and stellar spin.
This paper analyzes a quantum-corrected, nonsingular black hole solution in unitary unimodular gravity that features a minimal radius for black-to-white hole transitions, resulting in a maximal analytic extension of infinite Kruskal spacetimes while maintaining exterior properties close to the classical Schwarzschild metric.
This study investigates the mass-radius relation, moment of inertia, and tidal Love numbers of anisotropic neutron stars within the gravity framework using the Horvat anisotropy model, demonstrating that while both anisotropy and the gravity parameter influence physical properties, the former has a dominant effect, ultimately identifying specific configurations that satisfy observational constraints from GW170817 and GW190814.
This study investigates how variations in symmetry energy within nucleonic and hyperonic equations of state affect the global properties and universal relations of hot, isentropic compact stars in both static and maximally rotating configurations, demonstrating that these universal relations remain robust across diverse conditions relevant to binary neutron star mergers and proto-neutron stars.
By analyzing radial accelerations in 23 dwarf spheroidal galaxies, this study demonstrates that Verlinde's emergent gravity aligns more closely with observed data than Modified Newtonian Dynamics (MOND), favoring the emergent gravity model with a statistical significance of 5.2σ.