2649 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.
By demonstrating that quantum field theory can traverse the singularity in the Ferrari-Ibáñez solution but not in the Khan-Penrose solution, the authors propose a "quantum Weyl conjecture" asserting that the Coulomb part of the Weyl tensor is the key geometric property for classifying spacetimes under quantum probes.
This paper demonstrates that by incorporating gravitational constraints and a boundary charge into the algebra of observables on a dynamical black hole horizon, one can construct a Type- von Neumann factor whose entropy satisfies a first law of thermodynamics and is directly related to the Hollands-Wald-Zhang entropy of perturbed black holes via horizon and null infinity fluxes.
This paper investigates how primordial non-Gaussianity can convert small-scale Poisson fluctuations of evaporating primordial black holes into large-scale isocurvature perturbations in the dark sector, thereby establishing new constraints on dark matter production scenarios alongside re-evaluations of limits from overproduction, warm dark matter, and scalar-induced gravitational waves.
This paper investigates the optical and thermodynamic properties of a deformed Schwarzschild-AdS black hole coupled to a cloud of strings and perfect fluid dark matter, revealing that while geometric deformation and dark matter influence the black hole shadow, they do not induce new phase transitions, with criticality emerging only when the deformation parameter mimics an electric charge in a Reissner-Nordström-AdS-like regime.
This paper generalizes Ernst potentials and the Newman-Penrose formalism to five-dimensional potential space for arbitrary Einstein-Maxwell-Dilaton theories, demonstrating the utility of this framework for deriving both known and new exact spacetime solutions.
This paper analyzes radiative corrections in no-scale supergravity inflation models, demonstrating that while such corrections can destabilize predictions in certain Wess-Zumino scenarios, specific classes like the Cecotti model maintain small loop effects that preserve agreement with Planck CMB data.
This paper systematically investigates how Navarro-Frenk-White and Beta dark matter halo profiles influence the orbital dynamics and gravitational wave signatures of extreme mass ratio inspirals by modeling dynamical friction, accretion, and radiation reaction, revealing distinct long-term phase shifts and a unique energy flux cusp in the NFW model that could be detectable by future space-based observatories.
This study demonstrates that unmodeled orbital eccentricity in binary black hole mergers significantly biases inferred parameters—such as mass, spin, and distance—when analyzed with standard circular waveform models, particularly for systems with eccentricities above , thereby establishing the critical thresholds where eccentric waveform models become essential for accurate astrophysical inference.
This paper proposes a framework for testing quantum gravity by analyzing the stochastic gravitational-wave background from evaporating near-Planck-mass primordial black holes, demonstrating that their unthermalized graviton spectra preserve distinct signatures of modified temperature-mass relations that can be used to discriminate between various beyond-semiclassical theories.
This paper rigorously reformulates the effective radial dynamics of extremal black holes in Maxwell-Einstein-scalar theories within the Routhian formalism, elucidating the interplay between the Ferrara-Gibbons-Kallosh potential, Sen's entropy functional, and the effective Routhian to determine black hole entropies through their critical values at the event horizon.