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 forecasts that space-based observations of extreme-mass-ratio inspirals by LISA can constrain near-horizon multipolar deformations at unprecedented precision levels, offering the first direct empirical tests to distinguish between classical Kerr black holes and quantum-gravity-inspired fuzzball geometries.
This paper investigates how LISA observations of Extreme-Mass-Ratio Inspirals can probe deviations from the Kerr black hole paradigm by modeling axisymmetric and non-axisymmetric symmetry-breaking multipole moments, demonstrating that LISA can tightly constrain equatorial and axial symmetry breaking to and levels respectively, thereby testing General Relativity and alternative theories like string theory.
This paper proposes that strongly clustered, light primordial black holes can collapse into heavier black holes to constitute all dark matter, a scenario that would produce a detectable flat stochastic gravitational wave background observable by the Einstein Telescope.
This paper evaluates the limitations of traditional posterior predictive checks (PPCs) for poorly constrained gravitational-wave parameters and demonstrates that while PPCs on maximum likelihood parameters are theoretically superior, current observational data lacks the sensitivity to diagnose model misspecification in spin tilts, ultimately revealing that the Gaussian Component Spins model in the GWTC-4.0 catalog fails to accurately predict large spin magnitudes and perfectly anti-aligned tilts.
This paper provides a pedagogical 1+1-dimensional analysis of the relationships between cosmic time, conformal time, and the scale factor in a spatially flat Friedmann–Robertson–Walker universe, clarifying how these variables govern particle geodesics and spacetime curvature across radiation-dominated, matter-dominated, and de Sitter scenarios.
This paper demonstrates that the previously observed universal negativity of the equilateral bispectrum from massive scalar exchange during inflation is not a generic feature, but rather a consequence of restricted operator structures, as including additional EFT operators, reduced sound speed, or multi-particle exchanges can flip the bispectrum's sign to positive.
Using 3D hydrodynamical simulations, this paper demonstrates that the critical obliquity predicted by semi-analytic models for supermassive black-hole binaries corresponds to a disc-breaking phenomenon that disrupts the accretion disc and can compromise or prevent the alignment of black-hole spins with the orbital angular momentum.
This paper investigates the thermodynamic properties, stability, and Joule-Thomson expansion of static charged dilaton black holes in 2+1 dimensions within both canonical and grand canonical ensembles, revealing distinct stability regimes based on the coupling parameter and identifying a Hawking-Page phase transition for specific values.
This paper presents a coordinate- and spacetime-independent scalar-field solution within quantum field theory that unifies descriptions across various cosmological models, locally recovers standard Minkowski physics, and remains non-perturbative in strong gravitational fields.
This paper proves a global well-posedness and asymptotic convergence theorem for the -dimensional vacuum Einstein equations with a positive cosmological constant on globally hyperbolic spacetimes with negative Yamabe type manifolds, demonstrating that large initial data leads to solutions converging to a constant negative scalar curvature metric via a new integrable damping mechanism, thereby confirming Ringström's conjecture that such dynamics do not canonically encode the Thurston geometrization of the underlying three-manifold.