4428 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 investigates Dirac mini-stars in modified gravity sourced by linear and nonlinear spinor fields, demonstrating that increasing the nonlinearity parameter significantly alters the configurations' mass profiles, energy density, and metric functions compared to general relativity.
This paper investigates particle production of a massive scalar field in a time-dependent accelerated frame without horizons, revealing that the resulting algebraic spectrum arises entirely from the initial state's mismatch with the out vacuum and exhibits an inverse eighth-power decay for zeroth-order adiabatic states.
This paper constructs a rotating black hole metric embedded in an exponential dark matter halo and demonstrates that while the halo modifies orbital stability and quasiperiodic oscillation frequencies primarily through its central density, current observations of specific X-ray binaries constrain such dark matter cores to densities far below those typically found in ultra-dense environments.
This review outlines the transformative potential of upcoming ground-based and space-based gravitational-wave observatories to address key astrophysical and cosmological questions by expanding observational horizons, frequency bands, and source classes beyond current capabilities.
This paper establishes an exact radial stability threshold for a Minkowski-Schwarzschild thin shell, demonstrating that the flat interior represents the most favorable configuration for stability and defining the boundary within which any potential stabilizing mechanism must operate.
This paper investigates static, spherically symmetric black holes surrounded by dark matter halos in a universe with a positive cosmological constant, deriving energy condition constraints, demonstrating significant alterations to black hole images, and analyzing scalar quasinormal modes that exhibit a linear dependence on halo compactness modulated by the cosmological constant.
This paper demonstrates through Hamiltonian analysis that disformally coupled fermions in scalar-tensor theories do not introduce Ostrogradsky ghosts, as the nilpotent nature of fermion bilinears ensures that higher-derivative terms do not alter the theory's physical degrees of freedom.
This paper constructs and analyzes three-dimensional Chern--Simons gravity theories based on six resonant algebras, demonstrating that while three specific configurations are isomorphic to , they yield distinct gravitational realizations with unique field equations and metric sectors when maintaining the original field identification.
This study evaluates the scientific performance of various Einstein Telescope baseline configurations, finding that while a standalone triangular-plus-L-shaped setup outperforms other designs, the inclusion of external detectors like Cosmic Explorer reduces these differences and highlights the importance of optimizing relative detector orientations to mitigate correlated noise and maximize network sensitivity.
By comparing 3D global HD and MHD simulations of circumbinary disks, this study reveals that MRI-driven turbulence generates a gas torque 3.5 times larger and more variable than standard -viscosity models, significantly altering predictions for gravitational-wave dephasing in LISA binaries and accretion variability signatures for LSST and Roman.