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 numerically investigates the memory effect of test particles interacting with pp-wave Gaussian pulses for non-standard polarization modes, revealing that the relative kinetic energy variation exhibits a quartic dependence on wave amplitude determined by the wave's multipolar structure and integrated tidal field.
This paper demonstrates that a minimally modified gravity theory exhibiting VCDM-like behavior successfully reproduces the observed late-time cosmic acceleration and outperforms the standard CDM model when constrained by a comprehensive combination of cosmological datasets.
This study demonstrates that in Bianchi type-I quantum cosmology, the choice of wave packet structure critically determines both singularity resolution and quantum relaxation dynamics, where Lorentzian wavepackets generate stronger quantum potentials and more complex velocity fields that facilitate non-singular bounces and more effective relaxation toward Born-rule equilibrium compared to Gaussian superpositions.
Using two model-independent methods and recent observational data from Type Ia supernovae, baryon acoustic oscillations, cosmic chronometers, and gamma-ray bursts, this study confirms the validity of the cosmic distance duality relation within a 1σ confidence level, finding no evidence for its violation.
This paper proposes a -deformed Wheeler--DeWitt framework for Schwarzschild black and white holes that yields a finite-dimensional Hilbert space and bounded entropy, thereby resolving evaporation divergences through a stable cold remnant and establishing a consistent semiclassical link between quantum gravity and cosmology.
This paper demonstrates that while a specific exponential deformation of the Starobinsky model cannot support a positive-curvature vacuum bounce on its own, a minimal extension with an added constant term successfully realizes a stable, nonsingular cosmological bounce free of ghost and tachyonic instabilities, with well-behaved scalar and tensor perturbations in the Einstein frame.
This paper presents a closed-form analytic model of a flat-spacetime accelerating boundary that mimics Hawking-type emission with infinite asymptotic acceleration yet finite total radiated energy, unifying the study of scattering symmetry, horizon formation, and the distinction between local energy flux and global particle production to reveal a hybrid of normal and extremal black hole properties.
This paper investigates the asymptotic evolution of radiating stars by analyzing a master equation derived from stationary boundary conditions, identifying stationary points in the presence of charge and a cosmological constant, and establishing criteria for initial conditions that lead to a static geometry.
This paper introduces a novel on-shell equivalent reformulation of three-dimensional gravity using divergenceless vector frames inspired by the double copy for Chern-Simons theory, offering a transparent geometric interpretation and connecting the framework to Chern-Simons-like actions, higher-dimensional origins, and extensions.
This paper investigates the detection prospects of gravitational-wave displacement memory signals using future space-based interferometers, demonstrating that such soft signals from compact binary mergers and scattering events can be independently measured by a single LISA-like detector and precisely constrained by a LISA-Taiji network.