2593 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 demonstrates that combining LISA observations of extreme mass-ratio inspirals at low redshifts with massive black hole binaries at high redshifts significantly reduces cosmological degeneracies, yielding competitive constraints on the Hubble constant and dark-energy equation of state.
This paper investigates how viscosity affects the radial oscillations and gravitational collapse thresholds of cold, spherically symmetric neutron stars within both Eckart and BDNK hydrodynamic frameworks, finding that viscosity damps oscillations on millisecond timescales and shifts frequencies by up to the percent level without being able to stabilize an otherwise unstable star against collapse.
This paper demonstrates that dynamical dark energy theories, exemplified by the cubic Galileon model, induce cosmological "hair" around black holes that significantly alters their ringdown quasi-normal mode spectrum, enabling future gravitational wave detectors like LVK and LISA to constrain dark energy field profiles with high precision.
This paper investigates non-perturbative quantum gravitational corrections to the thermodynamics of -dimensional Schwarzschild–Tangherlini–Anti-de Sitter black holes, revealing that these effects induce a Hawking–Page transition, suppress specific heat magnitude, and reverse the sign of average quantum work during evaporation, thereby qualitatively altering the phase structure and energetics beyond what perturbative corrections can capture.
This paper demonstrates that while the entanglement entropy of massive scalar fields in the ground state follows a robust area law with exponential mass suppression, localized excited states violate universal $mR$ scaling due to the interplay between the field mass and the excitation's finite width, suggesting that black hole thermodynamics in semiclassical gravity may depend on multiple independent infrared scales.
This paper addresses the gauge inconsistencies in previous analyses of dust-shell dynamics by developing a systematic method for selecting consistent gauge conditions in effective quantum gravity, demonstrating that standard gauges like Painlevé-Gullstrand and Schwarzschild are incompatible with dust shells and verifying the new framework's agreement with Israel junction conditions.
This paper demonstrates that standard weak lensing formalisms are incomplete beyond linear order by deriving and numerically quantifying second-order relativistic corrections—specifically Sachs-basis rotation and frame-dragging effects—which break the degeneracy between rotation and shear B-modes and dominate the B-mode power spectrum on large scales, despite their overall small impact on observed galaxy ellipticity.
This paper derives expressions for the first and second derivatives of the quintessence potential in terms of cosmographic parameters and the scalar field density fraction, enabling a direct reconstruction of the potential's expansion around the present epoch without explicit reliance on the equation of state parameter.
This paper demonstrates that non-minimal effective scalar-tensor gravity provides a consistent framework for early-Universe scenarios including bounce, inflation, and genesis, while offering a potential explanation for the Hubble tension through its prediction of two distinct Hubble parameter values.
This review introduces standard dynamical systems methods and explores alternative polar and hyperbolic variable formulations to analyze the qualitative evolution of the universe and constrain scalar field dark energy models.