3735 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 radial momentum of a freely falling particle in the bulk, as measured by a stationary observer, is formally equivalent to the boundary spread complexity rate in AdS/CFT for particles of any mass, thereby unifying previous distinct formulations and providing a simplified method to derive spread complexity via optical geometry.
This paper presents the first computation of the six-loop Feynman diagrams required to determine the conservative gravitational interaction of two coalescing compact objects at the sixth post-Newtonian order within the effective field theory framework, providing the final missing ingredient for the complete description of their dynamics at this precision.
This paper presents a framework for the secular evolution of compact objects in accretion disks around supermassive black holes, demonstrating that relativistic orbital dynamics and specific disk structure models significantly influence the two-stage process of orbital alignment and eccentricity damping, with implications for understanding extreme mass-ratio inspirals and quasi-periodic eruptions.
This paper proves the future-completeness conjecture for expanding spatially homogeneous vacuum spacetimes up to nine dimensions, establishes -inextendibility criteria for two-step nilpotent cosmologies, and characterizes the global structure of Bianchi II vacuum solutions by identifying a dense set of inextendible developments versus a codimension-two locus featuring analytic Cauchy horizons.
This paper investigates how one-sided Kiselev-type quintessence in a reflection-asymmetric polymer thin-shell wormhole alters cross-throat optical signatures, demonstrating that environmental information from the opposite side is encoded in the observer's image through distinct critical structures, transfer functions, and intensity maps while leaving observer-side orbit numbers invariant.
This paper quantifies how Next-to-Leading Order nucleation calculations and gradient expansion corrections in a classically conformal Abelian Higgs model alter the particle physics interpretation of PTA gravitational-wave signals, revealing that these theoretical refinements significantly shift the preferred gauge coupling and input scale while identifying gravitational-wave spectra uncertainties as the dominant remaining theoretical limitation.
This paper introduces density vierbein variables and an auxiliary field to formulate gravity with a polynomial Hilbert action, demonstrating that while this approach simplifies scalar-gravitational couplings to a finite number of terms, it fails to achieve the same finite interaction structure for realistic matter models like fermions, vectors, or Horndeski theories, which still exhibit infinite interaction towers.
This paper derives the intrinsic pressure anisotropy in spherical Proca stars directly from the Einstein-complex-Proca theory, revealing a radially-to-tangentially dominated stress reversal controlled by the local mass-shell threshold that cannot be reproduced by standard phenomenological fluid closures.
This paper derives closed-form first-order corrections to the accelerating C-metric in higher-derivative gravity, revealing that parity-violating cubic curvature terms induce rotation and off-diagonal metric components while providing a thermodynamic analysis of the resulting AdS solutions.
This paper extends a theory-independent formalism for compact-binary dynamics to include preferred-frame effects by introducing a time-like vector field and vector sensitivities, thereby deriving modified equations of motion at the 1PN order that incorporate the PPN parameters and to enable gravitational-wave tests of gravity theories with preferred frames.