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 presents a gauge-invariant framework for reconstructing separated Bianchi frames using only the spatial Killing algebra, thereby preserving the computational advantages of time-dependent systems while ensuring stability under arbitrary diffeomorphism transformations.
This paper investigates non-Markovian cosmological models with causal memory kernels, finding that while an oscillatory kernel improves the fit to Hubble parameter data, it violates causality and is disfavored by Bayesian criteria, whereas other kernels are either consistent with zero amplitude or degenerate with a simple rescaling of the expansion rate that is less favored than the standard CDM model.
This paper demonstrates that extending the periodic-orbit framework to inclined orbits around Kerr black holes reveals a unique five-comb spectral signature induced by frame-dragging, which significantly improves spin measurement precision and provides a rigorous null test to distinguish rotating black holes from static spherical geometries.
This paper demonstrates that while Rényi entropy inequalities can theoretically strengthen the black hole merger area bound by accounting for initial correlations beyond local thermodynamics, these stronger constraints reduce to the standard area bound for equal Schwarzschild--AdS holes at leading semiclassical order, indicating that inferring tighter limits requires knowledge of initial correlations rather than yielding new dynamical instabilities or lighter remnants.
This paper demonstrates that horizon entropy alone cannot determine the force between black holes because entropy variations depend on arbitrary horizon labelings unless temperature is uniform, a finding that resolves apparent conflicts with general relativity by showing that proposed entropic repulsion effects either vanish or arise from gauge-dependent choices rather than physical interactions.
The paper demonstrates that Scalar-Tensor-Vector Gravity (STVG-MOG) is observationally indistinguishable from the standard CDM model for all isotropic and linear cosmological probes, implying that dark matter's existence cannot be confirmed by such data alone, but suggests that large-scale anisotropic measurements, such as enhanced radio-galaxy dipoles, offer a viable pathway to distinguish between modified gravity and particle dark matter.
This paper proposes a mathematical framework using the molecule as an analogue to model the scalar dynamics of a test particle in a tachyonic AII metric spacetime, demonstrating that its electronic wave function can reproduce the system's quasi-normal modes and Hawking radiation spectrum through a carefully tuned external potential.
This paper presents a semi-analytic study of charged fluid tori orbiting magnetized Schwarzschild black holes, demonstrating how an approximate magnetic self-field generated by the torus's own current modifies the equilibrium morphology and domain of existence compared to configurations dominated by external magnetic fields.
This thesis presents the first analytic computation of the impulse for classical black hole scattering up to the fifth Post-Minkowskian order using the worldline quantum field theory framework, revealing that the solution involves periods over Calabi-Yau manifolds.
This thesis investigates the perturbative dynamics and observational signatures of compact objects within quadratic gravity and asymptotic safety, revealing unique instabilities and horizonless mimics in Einstein-Weyl gravity while demonstrating how quantum corrections in asymptotically safe gravity lead to regular black holes with modified evaporation rates that could impact dark matter models.