2575 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 establishes that the admissibility of complete gauge-fixing is determined solely by the invertibility of the gauge-fixing constraint matrix, as the combined constraint determinant factorizes to decouple the second-class sector, thereby unifying Hamiltonian and Lagrangian completeness criteria and ensuring robustness in modified gravity theories.
This paper employs exact WKB analysis to demonstrate that the bow-shaped deformation of Stokes curves in the complex radial plane serves as a unique topological signature of the generalized JMN naked singularity, distinguishing it from black hole spacetimes by revealing a logarithmic branch-point singularity at the origin.
This paper introduces a novel, coordinate-independent framework for phenomenological quantum gravity that utilizes a dual spacetime structure—combining an observer-independent smooth manifold with an observer-dependent discrete causal set—to demonstrate that relative locality arises generally regardless of momentum-space curvature while preserving manifest causality and enabling applications to cosmology.
This paper provides a comprehensive analysis of weak gravitational lensing by developing relativistic formulations for light deflection in static and rotating spacetimes, deriving analytical expressions for photon orbits, and applying advanced methods like the Rindler-Ishak approach, Gauss-Bonnet theorem, and optical invariants to establish a unified geometrical framework for computing bending angles.
This paper presents an improved, publicly available numerical method based on the Bogoliubov approach that overcomes existing instabilities to accurately calculate the full spectrum of primordial gravitational waves from inflation through reheating, revealing how inflaton anharmonicity imprints distinct features on high-frequency signals.
This paper investigates the electromagnetic vacuum characteristics induced by a brane intersecting the AdS boundary under perfect electric and magnetic boundary conditions, deriving explicit expressions for Wightman functions and demonstrating that the resulting vacuum energy density and stress components exhibit distinct sign behaviors and non-vanishing properties unique to the AdS spacetime geometry.
This paper introduces a methodology for estimating the angular power spectrum of anisotropic stochastic gravitational-wave backgrounds by operating directly in the "dirty map" space to avoid Fisher matrix inversion biases, demonstrating its ability to reliably recover model parameters up to spherical harmonic order in Advanced LIGO noise simulations for both auto- and cross-correlation searches.
This study utilizes the latest LIGO-Virgo-KAGRA gravitational wave data and a comprehensive gamma-ray burst catalog to test the cosmological principle, finding no significant evidence for anisotropy and thus supporting the hypothesis that the Universe is statistically isotropic on large scales.
This paper proposes and validates a clock noise cancellation scheme for space-borne gravitational-wave telescopes using heterodyne links between optical cavities, which eliminates clock jitter by combining positive and negative beat-note signals to achieve the required sensitivity in the decihertz band without additional modulation.
This paper argues that by seriously analyzing the structural similarities between black hole paradoxes and Extended Wigner's Friend scenarios, the former supports interpretations of the latter that rely on intrinsic relationality and retrocausality rather than emergent relationality.