2693 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 derives and explicitly verifies Schwinger-Keldysh cutting rules for primordial cosmological correlators, demonstrating how unitarity-based discontinuities at both tree and loop levels can be expressed as products of lower-order correlators through the introduction of specific diagrammatic combinations not typically found in standard observable calculations.
This paper generalizes the covariant quasilinear wave equation for the Riemann curvature tensor, originally established for Levi-Civita connections, to spacetimes with generic affine connections featuring torsion and nonmetricity, and analyzes its specific forms within Einstein spaces, teleparallel gravity, and Einstein-Cartan theory.
This paper investigates how the chameleon mechanism in scalar-tensor theories causes superradiant scalar clouds around Kerr black holes to exhibit unique growth and stimulated decay patterns in non-uniform matter distributions, generating distinct electromagnetic signals that can differentiate fundamental scalars from other light bosonic fields.
This paper introduces a complete model for line-of-sight acceleration-induced dephasing in gravitational waves from stellar-mass binary black holes in three-body systems, demonstrating that future detectors like the Einstein Telescope can use these signals to constrain outer orbital parameters and distinguish between dynamical and AGN formation channels, while reanalysis of recent events reveals no evidence for such acceleration.
This paper utilizes an exact vacuum solution of gravity to analyze the Galactic Center black hole, demonstrating that specific scalaron mass values simultaneously reproduce the observed shadow characteristics, satisfy the "no-hair" theorem via a Kerr-like quadrupole moment, and align with Solar System weak-field constraints, thereby establishing a viable general relativistic limit for the theory.
This paper establishes algorithmic necessary and sufficient conditions for a pseudo-Riemannian manifold to be conformal to an Einstein space when the Weyl endomorphism is invertible, utilizing the -connection and demonstrating the construction of conformally covariant pseudo-differential operators.
This paper establishes a geometric mechanics framework using Euler-Poincaré reduction to derive 3-dimensional Eulerian equations of motion and Kelvin-Noether circulation conservation laws for self-gravitating barotropic fluids within the 3+1 ADM formulation of general relativity, thereby bridging relativistic hydrodynamics with Newtonian fluid dynamics and offering potential applications for numerical relativity.
This paper establishes the infinitesimal rigidity and integrability of the moduli space for Hermitian gravitational instantons, thereby completing the understanding of their local rigidity in both compact and non-compact cases by demonstrating that metrics near a Hermitian non-Kähler Einstein metric are conformally Kähler to second order under specific boundary conditions.
This paper derives the conservative dynamics of non-spinning binaries in massless scalar-tensor theories using the post-Minkowskian EFT formalism, presenting an analytic expression for the scattering angle up to third Post-Minkowskian order that aligns with existing literature and the post-Newtonian limit.
This paper establishes a linear kernel map connecting thermodynamic matter susceptibilities to black-hole geometric observables like shadow radius, demonstrating that under mild assumptions near critical points, the thermodynamic critical exponent is directly transferred to the geometric susceptibility with controlled corrections.