3826 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 the non-vacuum field equations of Cotton and Conformal Killing gravity admit a generalized Vaidya-type solution featuring two purely geometric correction terms that extend the classical General Relativity description of radiating spacetimes.
This paper qualitatively illustrates how higher-order relativistic effects, including Doppler and gravitational redshift, distort large-scale over-dense and under-dense regions in redshift space into asymmetric, egg- or bean-like shapes that break the line-of-sight symmetry typically associated with standard redshift space distortions.
This paper proposes that gravity originates from quantum vacuum energy, leading to an environmental and scale-dependent Newton's constant that resolves the Big Bang singularity, reinterprets black hole entropy, and potentially explains the Hubble tension within a symmetric cosmological model.
This paper proposes a non-parametric, self-consistency test for extreme mass ratio inspirals that detects environmental effects or deviations from General Relativity by identifying statistically significant inconsistencies in vacuum parameter posteriors inferred from different portions of the gravitational-wave signal, without requiring additional physical assumptions.
This paper demonstrates that by reversing the shift vector's sign and applying a specific ansatz, the Einstein equations for the Alcubierre warp drive can be formally decomposed into viscous Burgers-type and heat-type equations, revealing new mathematical structures in the shift-vector dynamics while clarifying that these features arise from geometric reduction rather than physical matter sources and necessitate a lower-dimensional interpretation of the solution.
This paper investigates the quantum cosmological dynamics of an FLRW universe within the gravity framework by employing Schutz's perfect fluid formalism to derive the Schrödinger--Wheeler--DeWitt equation and analyze the wave function of the universe, thereby highlighting the significant role of matter-geometry coupling in early-time cosmic evolution.
This paper demonstrates that optimizing the geometrical configuration of a torque-coupled gravity field calibrator significantly enhances the signal-to-noise ratio and reduces systematic uncertainty, thereby establishing a robust method for precision absolute calibration in the sub-Hz band of the CHRONOS torsion-bar gravitational wave detector.
This paper demonstrates that the CMB -distortion bound, which typically precludes the formation of supermassive primordial black hole seeds via Gaussian perturbations, can be evaded by invoking non-Gaussian probability distribution tails—specifically power-law or sufficiently heavy log-normal shapes—that decouple the small-scale variance from the collapse probability.
This paper investigates dynamical dark energy models within an anisotropic Bianchi Type-V universe using a covariant thermodynamics approach and confronts them with the latest DESI DR2, SNIa, and RSD datasets, finding that the combined anisotropy and dynamical dark energy framework effectively accommodates late-time observations and mitigates the and tensions, despite Bayesian criteria still favoring the standard CDM model.
This paper argues that the claim "spacetime emerges from entanglement" actually refers to three distinct phenomena—metric, gravitational dynamics, and topological connectivity—none of which fully satisfy the conditions for emergence because they rely on additional non-entanglement factors, with only gravitational dynamics qualifying as truly novel.