3826 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 the cosmic evolution of generalized Nash's gravity by performing a phase-space analysis on a power-law model that lacks a complete radiation-to-de Sitter sequence, while simultaneously constraining a regular observational branch using cosmological data to show it closely mimics CDM with tightly bounded quadratic corrections.
This paper demonstrates that rainbow cosmology, through energy-dependent modifications to the Friedmann equation and scalar field dynamics, provides a viable dynamical mechanism for generating the observed baryon asymmetry during the radiation-dominated era without requiring supersymmetry.
This paper investigates cosmological models and causality within the generalized gravity theory by deriving specific solutions for various fluid sources, constraining their parameters using Cosmic Chronometer and Pantheon+SH0ES datasets, and demonstrating that these models support both early and late-time cosmic acceleration while satisfying stability and causality conditions.
This paper investigates how combining Lorentz invariance violation with loop quantum gravity-modified photon dispersion relations explains cosmic photon threshold anomalies, specifically addressing gamma-ray attenuation by background radiation to bridge LQG theory with ultra-high-energy astrophysical observations.
By comparing gravitational-wave merger rates with gamma-ray burst observations, this study identifies a characteristic neutron star mass threshold that distinguishes burst durations and establishes a novel method for constraining the maximum mass of neutron stars and their equation of state.
This paper investigates a transit dark energy cosmological model within generalized matter-geometry coupling theory using a non-linear function, deriving the Hubble parameter and constraining model parameters via MCMC analysis of cosmic chronometer and Pantheon datasets to evaluate the universe's evolution, stability, and physical viability.
This paper employs the Noether symmetry approach within the framework of gravity to derive a specific functional form for the theory, demonstrating that the resulting cosmological solutions in a Friedmann-Robertson-Walker universe exhibit accelerated expansion consistent with a power-law scale factor.
This paper investigates how relaxing standard assumptions in stochastic inflation—specifically regarding the background metric, window function, and initial state—modifies the driving noise, demonstrating that while background and window deviations primarily affect amplitude or introduce color, deviations from the Bunch-Davies vacuum uniquely generate non-stationary, colored, and non-Gaussian noise.
This paper introduces , a locally symplectic-invariant geometric measure based on partner-mode overlap that quantifies correlations in Gaussian quantum field theories and provides a necessary and sufficient criterion for two-mode entanglement by characterizing how the spatial support of a mode's purification partner encodes its entanglement.
This paper proposes that the generalized uncertainty principle (GUP) is not a fundamental postulate but an emergent phenomenon arising from the multifractal geometric and thermodynamic microstructure of local spacetime horizons, thereby offering a unified geometric interpretation of quantum uncertainty.