2532 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 background-inert perturbative couplings in coincident gravity create a degeneracy between the primordial amplitude and the growth factor, leading to unphysically high values that can be resolved by imposing Planck priors, a constraint that ultimately penalizes the extended models with information criteria despite a weak statistical preference for the CDM++ variant.
This paper constructs and analyzes new families of regular, asymptotically flat solitons in the Einstein–Proca model, including magnetic and hybrid multipole configurations that are dynamically unstable and tend to decay into previously known electric-sector Proca stars or collapse into black holes.
This paper distinguishes between fully gravitational and partially frozen Hartle-Hawking wave functions in AdS and dS spacetimes, demonstrating that the former acquires a nontrivial one-loop phase due to boundary fluctuations while the latter remains real and positive, thereby establishing that the phase problem is controlled by the dynamical nature of the gravitational path integral.
This paper investigates the quantum mechanics of bosonic multi-matrix Lagrangians, specifically focusing on three matrix models, to derive the effective Hamiltonian of the collective field and analyze its vacuum solution and stability.
This paper proposes a laboratory-based graviton laser that overcomes the challenge of reflecting gravitons by utilizing the Gertsenshtein effect to convert them into photons for reflection and back into gravitons, thereby enabling arbitrarily long path lengths through a lasing medium.
This paper characterizes the "natural" polynomials that exactly tridiagonalize the Teukolsky radial equation for Schwarzschild and Kerr black holes as complex-valued Pollaczek-Jacobi polynomials, detailing their analytic properties and highlighting a unique recurrence relation peak specific to the Schwarzschild case.
This paper demonstrates that in linearly coupled scalar-Gauss-Bonnet theory, scalar hair sourced by black holes in de Sitter spacetime exhibits superhorizon temporal and spatial growth driven by the underlying dynamics of massless scalar fields rather than the black hole itself, resulting in a steady energy flux that renders static solutions transient and inconsistent.
This paper develops a Bogomol'nyi framework for two-field scalar theories with topological vacua in rotationally symmetric backgrounds of arbitrary dimensions, demonstrating how explicit radial potential dependence stabilizes localized solitons against scaling instability and yields exact solutions across various spacetimes, including Minkowski, Schwarzschild, and de Sitter geometries.
This paper outlines the scientific potential and practical feasibility of deploying a long-baseline atom interferometer at the South Pole to detect decihertz gravitational waves, leveraging the site's unique low seismic noise and infrastructure to enhance global detector networks and fundamental physics tests.
This paper demonstrates that the gravity model provides a viable mechanism for gravitational baryogenesis that successfully explains the observed baryon-to-entropy ratio and remains consistent with current cosmological observations, including Hubble parameter data and the Pantheon+SH0ES dataset, when compared to the standard CDM paradigm.