3285 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 investigates the evolution of a Bianchi type-VI universe under Lyras geometry influenced by a nonlinear spinor field, revealing that while the geometry fails to resolve existing constraints on the field's non-diagonal energy-momentum components, it significantly alters energy-momentum conservation and complicates the relationship between spinor invariants and spacetime geometry.
This paper proposes a novel inflationary scenario driven by a bare cosmological constant within Fab-Four gravity that naturally terminates via a self-tuning mechanism, demonstrating for the first time that such a process constitutes a viable dynamical possibility with relaxed initial condition tuning.
This paper applies a milder version of the Kontsevich-Segal-Witten (KSW) allowability criterion to demonstrate that while no-boundary instantons are KSW-allowed, wine-glass geometries are KSW-disallowed, despite the latter's potential for a longer inflationary phase.
This paper proposes the Locally Pumped Dark Energy (LPDE) model, a mechanism where the formation of dark matter halos displaces a heavy scalar field to generate vacuum energy, thereby naturally linking the onset of cosmic acceleration to structure formation at and offering a transient acceleration epoch consistent with recent DESI observations.
This paper demonstrates that any small, decaying solution to the linearized Einstein constraint equations about Minkowski spacetime can be corrected by a quadratically small term involving Kerr black hole data to yield a full solution that admits a regular conformal compactification, utilizing optimal weighted Sobolev estimates and a homotopy transfer theorem approach.
This paper proposes that the gravitational collapse of a spinning fluid into a black hole, governed by Einstein-Cartan theory, avoids a singularity through torsion-induced repulsion and a bounce, potentially giving rise to a new, oscillating universe on the other side of the event horizon that could explain the origin of our own cosmos.
This paper establishes a general criterion on two-parameter nonlinear electrodynamics Lagrangians for the existence of nonsingular dyonic black hole solutions and validates this criterion with a concrete example.
This paper investigates static spherically symmetric vacuum solutions in f(R) gravity within the Einstein frame, revealing that the scalaron field exhibits universal behavior across different astrophysical masses and scalarization region sizes, while also deriving asymptotic metric parameters near central naked singularities for three distinct scalaron potentials.
This paper provides a formal proof that Misner space, pseudo-Schwarzschild, and a new pseudo-Reissner-Nordström spacetime are pairwise isocausal on their universal covers, establishing a unified causal classification for these pathological models while delineating the specific equivariance conditions required for global isocausality in their compactified forms.
This study investigates the thermodynamic and quantum properties of Einstein-Power-Yang-Mills AdS black holes, demonstrating how the nonlinear Yang-Mills charge parameter modifies Hawking radiation, photon orbits, and induces the Aschenbach effect in spherically symmetric spacetimes, thereby offering potential observational signatures for instruments like the Event Horizon Telescope.