4432 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 exact gravitational solutions of the Skyrme model, including black holes, wormholes, and cosmologies, remain robust when extended from to , with key physical properties such as thermal stability, expansion dynamics, and wormhole throat size being systematically determined by the number of flavors and coupling constants.
This paper investigates holographic Krylov complexity in two confining bottom-up holographic QCD models, revealing that while massive particle complexity exhibits distinct behaviors (oscillatory vs. exponential) in the Einstein frame, both particle and string dynamics display oscillatory complexity in the string frame due to an infrared turning point, thereby highlighting the sensitivity of complexity to the choice of probe and conformal frame.
This paper investigates local gravitational energy and charges in Weyl gauge theory by treating translations as an internal Stückelberg redundancy, deriving gauge-invariant excitation equations and superpotentials that recover known results like the Schwarzschild ADM energy in the teleparallel limit while providing specific charge predictions for New General Relativity.
This paper demonstrates that for linearized metric spin-2 theories in four dimensions, including Fierz-Pauli and curvature-squared models, no strictly gauge-invariant local representative of the translation Noether current exists, despite the presence of a nonzero conserved-current class and a distinct surface-charge class arising from reducibility parameters.
This paper reformulates the calculation of relativistic dynamical friction diagnostics within the boosted Kerr-Schild frame for non-spinning black holes, demonstrating that this horizon-penetrating approach reproduces previous results while offering computational advantages and establishing a general framework for transforming observables in 3+1 evolutions.
This paper demonstrates that while a purely Boltzmann reflectivity cannot define a causal black-hole boundary, constructing causal completions with specific low-frequency phase expansions allows the redshifted outer phase to cancel the leading propagation dependence, thereby significantly reducing discrepancies in cavity factors between different cutoff models.
This paper presents the Wheeler-DeWitt quantization of Geometric Inflation models, utilizing Schutz's formalism for perfect fluids and Caputo fractional derivatives to derive and solve the resulting wave equations for radiation-dominated universes without requiring an inflaton field.
This paper proves the OSV conjecture to all orders in the topological string coupling by demonstrating that the gravitational path integral for black hole indices localizes to the poles of Euclidean black hole saddles, where the contributions are determined by the holomorphic and anti-holomorphic topological string free energies.
This paper investigates the reheating dynamics in modified loop quantum cosmology (mLQC-I) using various inflationary potentials, finding that while reheating parameters are highly model-dependent, the total expansion from the quantum bounce to the present remains robustly consistent with standard LQC predictions.
This paper presents the first Monte Carlo simulation of theory on Euclidean de Sitter space using a symmetry-preserving spectral lattice, confirming that the stochastic formalism correctly resums infrared divergences and revealing a de Sitter counterpart to the triviality mechanism that bounds the Higgs mass in flat space.