3919 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 a predictive framework for controlled penumbral inflation by demonstrating that local branch data in long monodromic valleys determine the existence of inflationary plateaus, thereby identifying a specific analytic family with an exactly solvable two-field attractor that remains predictive under higher-order corrections.
This paper introduces the Bayes factor-Bayes factor (BB) plot, a diagnostic tool that leverages the relationship between Bayes factors and their distributions under competing hypotheses to validate calculation accuracy and efficiently estimate background distributions, as demonstrated through applications in gravitational wave astronomy including the statistical significance assessment of GW231123.
This paper demonstrates that requiring UV completeness in a specific class of scalar-tensor gravity models restricts their infrared parameters to a narrow region, thereby ruling out a portion of the parameter space currently accessible to fifth-force experiments and offering a direct path to falsify these theories.
This paper introduces a frequentist -value method to test the adequacy of gravitational-wave formation models, demonstrating that while some proposed explanations for exceptional events like GW190521 are sufficient, others fail to adequately account for the observed data.
This paper introduces a Gaussian process framework with a time-localized kernel to test general relativity using gravitational wave data from binary black hole mergers, finding no evidence of deviations in GWTC-3 events and constraining fractional strain deviations to as low as 7%.
This paper constructs and analyzes electrically charged, rotating traversable wormhole solutions supported by Casimir energy and thermal stress, demonstrating that specific configurations—such as those with constant ZAMO angular velocity or radially decaying rotation—can satisfy Einstein's field equations while preserving static-like properties or mitigating unrealistic long-range frame dragging.
This paper utilizes a comprehensive Markov Chain Monte Carlo analysis of S2 star orbital data around the supermassive black hole Sgr A* within the framework of bumblebee gravity to constrain the Lorentz-violating parameter , yielding limits approximately three orders of magnitude tighter than previous constraints from Event Horizon Telescope imaging.
This paper demonstrates that in Hořava-Lifshitz gravity, the compactness gap between black holes and neutron stars can vanish for fermionic objects above a certain mass threshold, potentially blurring the classification of LIGO-Virgo-KAGRA detections and suggesting that fermions with a mass of approximately 40 GeV could constitute compact dark matter.
This paper investigates the impact of adopting an -vacuum instead of the standard Bunch-Davies vacuum on inflationary observables within the Starobinsky model, concluding that Planck data and sub-millimeter gravity constraints severely limit the viability of -vacua as a de Sitter-invariant alternative.
By reanalyzing low-energy CO data with updated nuclear constraints, this study establishes a lower value that favors a higher lower-edge mass gap for first-generation black holes, estimated between 61 and 75 solar masses.