3949 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 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.
This paper investigates the emergence and detection of Hawking radiation in a quenched 1D chiral spin chain by mapping its dynamics to a curved spacetime Dirac fermion, revealing that while the radiation spectrum exhibits greybody-like deviations, a weakly coupled qubit detector can faithfully measure the Hawking temperature, whereas strong coupling obscures the thermal signature by thermalizing with the global environment.
This paper investigates the dark energy problem and the tension by deriving exact cosmological solutions for a polytropic equation of state within a power-law gravity framework, utilizing Bayesian statistical analysis to constrain model parameters and evaluate their physical implications.
This paper investigates the geodesic motion and epicyclic oscillations of particles around Einstein-Skyrme Anti-de Sitter black holes, revealing a unique signature where the radial frequency overtakes the orbital frequency at large distances, and demonstrates through MCMC analysis of X-ray binary and galactic center QPO data that this model consistently fits observations with a Skyrme charge parameter of approximately 0.6.
This paper investigates the gravitational lensing of massless particles around a rotating, charged Kerr-Sen black hole immersed in magnetized plasma, analyzing how both homogeneous and inhomogeneous plasma distributions, along with the black hole's rotation and charge, influence light deflection and circular photon orbits compared to the vacuum case.
This paper demonstrates that while Hybrid cosmology remains geometrically degenerate with CDM in the background expansion due to strict viability constraints, its unique perturbation sector—characterized by a suppressed effective gravitational constant and an amplitude compensation mechanism in —breaks this degeneracy and gains moderate statistical preference when constrained by redshift-space distortion data.