2489 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 introduces a general framework for deriving linearized dispersion spectra in Lorentz boosted frames using only local rest-frame data, revealing the emergence of causality-violating "spurious modes" and establishing a direct link between mode conservation and the causality of relativistic fluid theories.
This study compares the standard CDM model with the alternative cosmology using joint constraints from DESI DR2 BAO, cosmic chronometers, and Pantheon supernova data, finding that while both models fit the data, CDM provides a superior statistical fit and naturally explains the observed transition from deceleration to acceleration, whereas predicts a strictly linear expansion.
This paper presents a numerical investigation demonstrating that the monotonicity of Hawking mass remains stable under controlled perturbations of extrinsic curvature in Minkowski spacetime, thereby establishing a computational framework for studying uniformly expanding flows in more general spacetime geometries.
Using the Feynman-Vernon influence functional formalism, this paper derives a quantum master equation to demonstrate that a weak gravitational field modifies the spontaneous emission rate of a dissipative two-level atom interacting with a scalar field, with the enhancement or suppression of this rate depending on the atom's dipole, position, and radiation frequency due to time dilation and dipole radiation effects.
This paper employs the Hamilton-Jacobi formalism to generalize slow-roll inflation through non-standard entropy frameworks, introducing a novel Hubble parametrization that yields observationally consistent constraints on Tsallis, Rényi, and Kaniadakis parameters while analyzing the impact of tensor-to-scalar ratio uncertainties on model viability.
This paper investigates the optical, thermodynamic, and perturbative properties of a Schwarzschild black hole immersed in a Hernquist dark matter halo, demonstrating that the dark matter distribution significantly modifies photon trajectories, thermal stability, and scalar field dynamics compared to the standard vacuum solution.
This paper investigates the semiclassical evolution of Hawking atmospheres around evaporating anti-de Sitter black holes by combining the Parikh-Wilczek tunneling method with renormalized energy-momentum tensor calculations to reveal significant deviations from ideal blackbody behavior driven by strong backreaction effects.
This paper proposes a novel method to probe the validity limits of the semiclassical Einstein equation by constructing a controlled, analytically tractable scenario where a mixture of weak-gravity quantum states drives the system into a strong-gravity regime, allowing for a direct comparison between quantum and semiclassical predictions via a branch-degenerate observable.
This paper proposes a quantum-induced modification to the stress-energy tensor within a torsion-free, quantum-deformed metric framework on a Riemann manifold, which reconciles General Relativity with Quantum Mechanics by introducing minimal length uncertainty and non-conserved energy-momentum exchange, while recovering classical formulations in the limit of vanishing quantum effects.
This paper investigates a generalized WKB ansatz for the quantum propagator by introducing an additive exponent as a measure of quantumness, analyzing its role through the Hamilton-Jacobi equation, and exploring its application to various systems, field theories, and Hamiltonian-constrained dynamics.