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 reports an unmodeled, targeted search for generic gravitational-wave transients coincident with high-energy neutrinos detected by IceCube during the LIGO-Virgo-KAGRA third observing run, finding no statistically significant signals and establishing lower bounds on the distances of potential sources.
This paper presents the first data-driven, model-agnostic reconstruction of the joint four-dimensional distribution of binary black hole mass and spin parameters, revealing four distinct subpopulations and new correlations that provide novel insights into their diverse astrophysical origins beyond the capabilities of previous strongly modeled or lower-dimensional analyses.
This paper analytically demonstrates that photons and gravitons confined in a Casimir box undergo a first-order phase transition closely related to Bose-Einstein condensation, driven by symmetry breaking from boundary conditions and controlled by the chemical potential for optical helicity.
This paper explores an alternative route to gravitational theory by promoting the global Poincaré invariance of scalar fields in special-relativistic physics to local symmetries, resulting in a model based on local Lorentz symmetry that extends General Relativity by introducing a standard of time and permitting non-flat gauge fields even in spacetimes with Minkowski or flat Euclidean metrics.
This paper employs dynamical system analysis to demonstrate that specific formulations of the Aether Scalar Tensor theory, which approximate dust-like behavior at early cosmic times, can successfully replicate the background cosmological evolution of the CDM model while satisfying weak-field constraints.
This paper investigates the occurrence of sudden (type-II) cosmological singularities in Aether scalar-tensor theories, demonstrating that while they can arise from scalar field dynamics or fluid pressure divergences, they can be prevented by specific action choices and are consistent with current cosmological observations, with the jerk parameter favoring models where such singularities occur within approximately 1.2 times the current age of the universe.
This paper demonstrates that by imposing a physically consistent renormalization condition and accounting for the required tachyonic photon mass in de Sitter space, the Schwinger current for charged fermions and scalars is finite and positive even in the massless limit, thereby resolving previous issues of negative infrared divergence and offering new insights into magnetogenesis and inflationary dark matter production.
This paper strengthens no-go theorems for pointwise-defined quantum fields by demonstrating that weak continuity, combined with canonical commutation relations, microcausality, or Poincaré-invariant vacuum conditions, necessitates the vanishing of general spinorial fields on globally hyperbolic and Minkowski spacetimes.
This study employs Bayesian and machine-learning analyses on nonminimally coupled gravity within the metric-affine formalism to demonstrate that the framework offers a flexible approach for late-time cosmology that partially alleviates the tension while remaining consistent with diverse observational datasets.
This paper demonstrates that the regular cosmological volume function is often a continuously differentiable temporal function, thereby enabling a canonical metric splitting and the induction of a "Wick-rotated" Riemannian metric, while also providing further results and examples related to cosmological time and volume functions.