2615 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 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 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 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.
This paper constrains a diffusive dark fluid cosmological model using Planck 2018 CMB and DESI DR2 BAO data, finding that the model yields Hubble constant values consistent with Planck measurements and demonstrates distinct effects on cosmic evolution and structure formation compared to the standard CDM model.
This paper presents a general framework for constructing spherically symmetric thin-shell spacetimes by matching arbitrary homogeneous and isotropic cosmologies to Schwarzschild black holes, yielding twenty-two distinct solution families—including new exact solutions and Swiss-cheese models—that offer significant insights for holography and quantum cosmology.
This chapter reviews the physics of colliding black holes and neutron stars, emphasizing how neutrinos influence observable signals and the nucleosynthesis of heavy elements in the ejected matter.
This study demonstrates that the CCC+TL cosmological model, proposed to explain JWST's high-redshift galaxy observations, is strongly disfavored by model-independent Hubble parameter measurements due to severe internal tensions between its supernova-optimized parameters and cosmic chronometer data, suggesting that the observed galaxy anomalies likely stem from intrinsic early-universe galaxy evolution rather than new physics.