3805 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 extends a proposed solution to the cosmological constant problem by introducing deformations that restore dynamics in a compact extra dimension, demonstrating that vacuum energy cancellation persists in the background while identifying specific conditions required to avoid ghost instabilities and address residual Casimir contributions.
This paper investigates the tidal forces of the Dymnikova regular black hole, demonstrating that its de Sitter core prevents tidal divergence and singularity formation by keeping tidal forces finite and causing infalling particles to turn around before reaching the center, in contrast to the divergent behavior found in Schwarzschild black holes.
This paper develops a fully relativistic framework to demonstrate that future space-based gravitational-wave observatories, such as LISA, can detect and characterize the distribution and nature of dark matter around supermassive black holes by analyzing how relativistic dark-matter halos primarily alter the conservative spacetime geometry and gravitational-wave phase evolution of extreme- and intermediate-mass-ratio inspirals.
This paper constructs a two-scale, static, spherically symmetric regular black hole solution in Einstein gravity sourced by magnetic nonlinear electrodynamics and a T-duality-inspired zero-point length, analyzing its geometric properties, thermodynamics, optical metrics, and observational signatures such as shadows and plasma effects.
This paper extends the modified double-copy formalism to quasitopological gravity coupled to matter by mapping spherically symmetric field equations in -dimensional curved spacetime to an auxiliary nonlinear gauge field in flat -dimensional spacetime, thereby generating Kerr--Schild solutions for various matter sources including Maxwell, nonlinear electrodynamics, and Yang--Mills fields.
This paper establishes a horizon-regular double-null criterion in spherical gravity that demonstrates a necessary source reversal and integral balance between outer and inner marginal horizons, thereby proving that a regular nondegenerate future inner horizon cannot exist without a corresponding outer horizon and a specific violation of a derived inequality involving the scalaron and matter fields.
This paper proposes a modified Polyakov-Nambu-Jona-Lasinio model with a chemical potential-dependent Polyakov potential to describe cold dense matter, demonstrating that repulsive vector interactions and a stiff hadronic equation of state are essential for forming stable hybrid stars with quarkyonic or deconfined cores that exceed two solar masses.
This paper proposes and analyzes "waterfall-modulated" -attractor models that incorporate hybrid-inspired features like potential uplifts and premature termination of inflation to continuously tune cosmological predictions, allowing for higher scalar spectral indices () and lower tensor-to-scalar ratios () while preserving the characteristic -attractor relation.
This paper investigates how finite temperature affects the equilibrium structure of white dwarfs in massive Brans-Dicke theory and other modified gravity models, revealing that while a non-zero temperature significantly increases stellar radii, it leaves the total mass essentially unchanged.
This paper constructs four families of single-variable spacetime metrics for a broad class of D-dimensional gravitational theories coupled to scalar and Abelian gauge fields, demonstrating their application to specific supergravity models where the scalar manifold geometry dictates the structure of the resulting solutions.