2593 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 classical spectral functionals defined via the Wodzicki residue from torsion-free Dirac operators to geometries with torsion, demonstrating that their local densities recover fundamental geometric tensors and introducing novel chiral spectral invariants through a grading operator.
This paper reviews the cosmic generalization of the virial theorem, known as the Layzer-Irvine equation, examining its applications in dark matter-dark energy interaction models and alternative gravity theories while outlining future research directions.
This paper investigates photon spheres in four-dimensional static and spherically symmetric black holes within dRGT massive gravity, revealing that while standard Einstein-like black holes possess a single unstable photon sphere, specific parameter regions allow for configurations with two or no photon spheres that exhibit distinct topological charges and stability properties compared to horizonless compact objects.
This paper investigates a non-minimally coupled Weyl connection gravity model that unifies gravity and electromagnetism while mimicking dark matter and energy, deriving its cosmological field equations and analyzing scalar perturbations alongside new black hole solutions featuring additional horizons.
This paper generalizes the covariant phase space formalism to semi-classical gravity by defining a semi-classical symplectic two-form as the sum of the gravitational symplectic form and the Berry curvature of the quantum matter state, demonstrating its slice independence and its duality to the Berry curvature in the boundary CFT within the AdS/CFT framework.
This paper proposes a holographic correspondence where the observed cosmic acceleration, traditionally attributed to a cosmological constant, is instead explained as an entropic effect arising from the thermodynamic properties of the boundary's quantum degrees of freedom, a model known as GREA that predicts distinct deviations from the standard CDM model in the growth of large-scale structures testable by upcoming surveys.
This paper investigates how the presence of a massless topological shell within a neutron star alters its equilibrium structure and radial oscillation modes, revealing distinct, non-monotonic gravitational-wave signatures that may be detectable by current and future observatories like Advanced LIGO and the Einstein Telescope.
This paper presents a model-independent framework that uses cosmic chronometer measurements of the Hubble parameter to directly reconstruct the background effective field theory functions of dark energy, enabling the testing of various cosmological models and the constraint of specific theories like quintessence without assuming a predefined scenario.
This paper investigates classical solutions for non-vacuum and vacuum anisotropic Bianchi Type I cosmological models within gravity theories, utilizing a Hamiltonian approach with a barotropic fluid to derive results in two specific gauges that often serve as ansatzes for solving Einstein field equations.
Through extensive time-domain numerical simulations of a Schwarzschild black hole in a cubic-in-curvature effective-field-theory extension of general relativity, this paper demonstrates that while the loss of isospectrality between polar and axial quasinormal modes complicates the identification of individual fundamental modes in gravitational waveforms, it can still provide evidence for non-general-relativistic physics.