3317 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 complete classification of generalized Schwarzian theories as integrals over Virasoro coadjoint orbits, demonstrating their correspondence to near-dS gravity and providing exact solutions for their oscillatory path integrals despite inherent ambiguities in defining quantum fluctuations.
This paper demonstrates that while Thiemann regularized loop quantum cosmology successfully resolves the big bang singularity and naturally dampens anisotropic shear through an emergent Planckian de Sitter phase, this isotropization mechanism is non-generic and comes at the steep price of preventing the universe from ever becoming truly classical in the post-bounce regime.
This paper proposes a Robinson-Trautman evolution in (2+1)-dimensional spacetime driven by a fourth-order length-preserving equation for a metric-defining function, demonstrating through numerical solutions that generic regular initial data relaxes toward stationary boosted BTZ black holes, thereby providing a simplified toy model for dissipative dynamics driven by null radiation in lower-dimensional gravity.
This paper proposes the "holographic quantum foam" (HQF) model, which predicts a dark sector governed by infinite statistics and suggests that the extreme brightness and multi-wavelength data of the recent GRB221009A event provide observational evidence for Planck-scale spacetime fluctuations manifesting as image blurring in distant sources.
This paper contrasts the behavior of spherically symmetric matter models near a weak null singularity in a black hole, demonstrating that while dust maintains bounded energy density and timelike velocity without shell-crossing, a stiff perfect fluid exhibits diverging energy density and a velocity vector that asymptotically approaches an ingoing null direction.
This paper challenges the conventional view that black holes possess intrinsic entropy by employing a linear amplifier model to argue that black holes instead create and emit entropy during their operation, with the total emitted entropy matching the standard expression proportional to the square of the black hole's mass.
This paper resolves the longstanding problem of Finsler metrizability for torsion-free affine connections with vectorial nonmetricity by deriving the necessary and sufficient conditions for their autoparallels to be variational and explicitly constructing the corresponding Finsler Lagrangians.
This study analytically investigates how the Hawking effect in a GHS dilaton black hole background influences the N-partite mutual information and relative entropy of coherence for bosonic and fermionic GHZ and W states, revealing that fermionic mutual information exceeds bosonic mutual information while the opposite trend holds for coherence, thereby highlighting the necessity of tailoring quantum resources to particle species and state structures in relativistic quantum information tasks.
This paper demonstrates that charged Taub-NUT black holes in Einstein-Maxwell-scalar-Gauss-Bonnet gravity undergo spontaneous scalarization, leading to a new branch of hairy solutions that possess strictly higher entropy than their scalar-free counterparts and exhibit a universal local entropy maximum at the bifurcation point.
This paper demonstrates that shift-symmetric quadratic-order higher-order scalar-tensor theories admit exact, fully nonlinear pp-wave solutions, including "stealth" configurations where a nontrivial scalar field coexists with gravitational waves without altering the spacetime geometry, while also analyzing their behavior under disformal transformations and their compatibility with observational constraints.