3875 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.
GRTresna is an open-source, multigrid solver designed to generate initial data for numerical relativity simulations involving fundamental fields around black holes and inhomogeneous cosmological spacetimes, based on the formalism presented in arXiv:2207.03125.
This paper elucidates the mechanism behind the nonlocal information encoding of entang islands in a manifestly local theory by demonstrating that the effective mass of the graviton in island models, specifically within the Karch-Randall braneworld, enables the interior information of black holes to be encoded in early Hawking radiation.
Using recent cosmological data, this study constrains a Dirac--Born--Infeld dark energy model with a chameleon mechanism, finding that the model is mildly disfavored compared to CDM due to negligible improvements in fit quality and constraints indicating a lack of significant self-interaction.
This paper proposes a refined "local inflation bubble" mechanism to theoretically expand Planck-scale quantum wormholes into macroscopic structures within an inflationary de Sitter background, while calculating the specific stress-energy requirements and intrinsic lower bounds for the exotic matter needed to sustain such a bubble.
This paper demonstrates that in both Loop Quantum Cosmology and its modified variant, a combined potential featuring an ekpyrotic component can effectively suppress shear during the bounce to resolve anisotropy issues, while subsequently allowing the inflationary component to dominate and produce a sufficiently long inflationary phase.
This paper proposes a Kaniadakis holographic dark energy model within modified Kaniadakis cosmology using the Hubble radius as an IR cutoff, demonstrating that it can explain current cosmic acceleration without interaction, mimics a cosmological constant in a dark energy-dominated era, and exhibits phantom behavior and distinct statefinder evolution when interaction with dark matter is considered.
This paper proposes a novel fiber-based Sagnac interferometer to perform a precision terrestrial measurement of the Shapiro time delay, aiming to determine the PPN parameter gamma with a sensitivity of 10⁻⁹ and thereby provide an independent laboratory-scale test of General Relativity.
This paper argues against the conjecture that bulk local field algebras exist within causal diamonds at finite UV cutoffs, asserting instead that such a description only emerges in a double-scaled limit where the boundary cutoff and both approach infinity, thereby precluding any bulk field theory resolution of distances smaller than the AdS radius.
This paper establishes that gravitational helicity, derived as a conserved Noether charge from a duality symmetry in connection variables, is directly linked to the Nieh-Yan topological term when expressed in real variables.
Using hierarchical Bayesian inference on the GWTC-4.0 catalog, this study constrains the gravitational wave memory enhancement factor to be consistent with General Relativity and forecasts that approximately 2,500 detections are required to significantly distinguish the effect from zero.