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 develops an inverse reconstruction procedure for spherically symmetric spacetimes with vanishing radial pressure to determine exact space-time evolution from prescribed density or velocity profiles, demonstrating applications in modeling the collapse to unstable Einstein clusters and finite-amplitude oscillations around stable configurations.
This paper characterizes the realization-dependent fluctuations in the angular correlation and power of nanohertz gravitational waves from finite supermassive black-hole binary populations, revealing a frequency-dependent transition from interference-dominated to population-power-dominated variance and providing statistical benchmarks via hybrid modeling and multivariate lognormal approximations.
This paper reconstructs General Relativity by deriving Einstein's field equations from operational and dynamical principles—specifically the tendency of free particles to maximize proper time and matter's capacity to alter local time rates—rather than postulating spacetime geometry as a starting point.
This paper establishes that the reduced ladder sum of melonic conformal field theories can be exactly mapped to the boundary-to-boundary propagator of a single free scalar field in rigid AdS subject to Robin boundary conditions, thereby providing a holographic dual for models like SYK and the Amit-Roginsky model using only one bulk degree of freedom.
This paper presents a 30-year synthesis of astrometric observations of 15 SiO stellar masers and the Sgr A* continuum to establish a precise, stable reference frame for the Galactic Center, achieving sub-AU positional uncertainties that enable rigorous tests of gravity and black hole physics while highlighting flux variability as a potential limit for future acceleration measurements.
This paper demonstrates that while the equivalence between Hamiltonian and covariant field equations in quadratic gravity holds nonperturbatively without gauge conditions, a specific gauge is necessary in the perturbative regime to derive the theory's quantum Lagrangian and characterize its quantum modes via BFV quantization.
This thesis formulates and implements a novel, gauge-invariant stochastic framework for cosmological inflation within full general relativity using the Keldysh formalism and numerical relativity, thereby enabling the nonperturbative study of inflationary inhomogeneities and eternal inflation without relying on historical approximations like the separate universe model.
This paper proposes that dark, gravitationally interacting cosmological domain walls leave distinct, non-Gaussian imprints on the Cosmic Microwave Background which can be detected using advanced curvelet/wavelet analyses and neural network-based inference, potentially allowing future South Pole Telescope-like surveys to probe symmetry-breaking scales as low as 10–100 MeV.
This paper investigates the non-equilibrium thermodynamics of Vaidya-AdS black holes and their gauge-gravity duals, demonstrating that a first-order phase transition occurs during gravitational collapse and establishing a consistent holographic framework for describing both equilibrium and non-equilibrium processes in strongly coupled gauge theories.
This paper investigates how a nonzero graviton mass modifies the Hellings-Downs correlation in pulsar timing arrays by introducing massive dispersion and additional polarizations, revealing that finite-distance effects persist in the massive limit and proposing a phenomenological framework to characterize scalar mode suppression relative to tensor modes.