2532 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 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.
This paper presents a high-precision gravitational redshift test using the China Space Station's Laser Time Transfer system, achieving a verification precision of approximately 10⁻⁷ by leveraging a c⁻³ relativistic model to eliminate ionospheric and first-order Doppler effects, thereby establishing a new benchmark for fundamental physics and geodetic applications.
This paper demonstrates that the power-law gravity model supports static, spherically symmetric traversable wormhole solutions sustained by localized violations of energy conditions and repulsive anisotropic stresses, which are shown to be both geometrically consistent and dynamically stable through equilibrium analysis, quasinormal mode calculations, and time-domain simulations.
This paper extends the restricted phase space formalism to quasi-local regimes with static observers at finite distances, demonstrating that RN black holes in this setting exhibit thermodynamic behaviors and phase transitions strikingly similar to asymptotic RN-AdS black holes, including Hawking-Page-like transitions in the neutral limit, provided an extra pair of thermodynamic variables (pressure and boundary area) is included.
This paper presents the first computation of gravitational-wave memory from full inspiral-merger-ringdown waveforms in scalar Gauss-Bonnet gravity, revealing percent-level deviations from General Relativity driven by modified merger dynamics and demonstrating that including memory significantly enhances the ability to test gravity with next-generation detectors.
This paper investigates how various gravitational uncertainty principles (GUP, EUP, GEUP, and LQGUP) introduce quantum gravity corrections to the maximum entropic force, revealing that the modified force depends on both the specific uncertainty principle parameters and the number of Planck areas constituting the EUP area.
This article demonstrates that Modified Newtonian Dynamics (MOND), a leading alternative to dark matter, can be successfully integrated as a special case within the framework of matrix gravity, thereby validating the latter theory and justifying further investigations.