2489 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 demonstrates that approximating the gravitational background as an exact FLRW spacetime in lattice inflation simulations prevents the freezing of superhorizon modes and significantly distorts inflationary observables, particularly during ultra-slow roll, prompting the authors to propose a validity criterion and implement it in CosmoLattice.
This paper critically reviews an inductive method for constructing gravity models based on Solar System physics and applies the resulting framework to derive the modified Newtonian potential of extended sources, highlighting its potential relevance for galactic dynamics.
This paper investigates the extreme spin and mass properties of the gravitational-wave event GW231123, demonstrating that while significant orbital eccentricity could mimic near-extremal spins in standard models, current data still favors quasi-spherical templates, though improved eccentric models and ringdown analyses are needed to fully resolve the event's nature.
This paper establishes a unified bulk-first framework deriving both ordinary and generalized Schwarzian dynamics from two-dimensional BF gravity via Drinfeld-Sokolov reductions, revealing how higher-rank sl(3,R) theories governed by Wilczynski invariants naturally link flat BF connections to projective geometry, Casimir charges, and boundary thermodynamics.
This paper investigates the dephasing effects of a torsion-inspired, spin-polarized dark matter spike on extreme-mass-ratio inspirals by modeling the interaction as a local near-zone Kerr deformation, finding that while the resulting fiducial model predicts significant phase shifts, these serve as constraints on an effective operator rather than definitive predictions for a complete Einstein--Cartan black hole solution.
This paper proposes a traversable wormhole model supported by a Casimir source corrected by gravitational memory, demonstrating that the resulting positive correction softens the negative energy density, modifies the near-throat geometry, and yields solutions consistent with Event Horizon Telescope observations of M87*.
This paper investigates how quantum corrections from Schwarzian and soft modes in charged near-AdS black holes modify the Page curve, revealing that the net shift in Page time results from a competition between the mode's delaying effect and the Schwarzian mode's advancing effect.
This paper employs ray-tracing simulations to demonstrate that in Rastall gravity, increasing the structure parameter enlarges the shadow radius of a rotating black hole while simultaneously reducing its distortion, thereby offering a potential observational method to constrain the theory's parameters.
This paper presents the first Fisher forecast demonstrating that multi-band gravitational-wave observations, combining space-based B-DECIGO and ground-based Einstein Telescope and Cosmic Explorer detectors, significantly enhance cosmological parameter constraints and enable unprecedented redshift-resolved measurements of gravitational-wave clustering bias compared to single-band or ground-only configurations.
This paper demonstrates that by augmenting a single reference spin with a second large-spin system and applying group averaging, one can recover the standard quantum mechanical description of a spin relative to other quantum systems, overcoming the limitations of previous single-reference approaches that yielded only classical probabilistic mixtures.