3285 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 investigates the repetitive Penrose process in Kerr-Taub-NUT black hole spacetime, demonstrating that while the gravitomagnetic charge expands the event horizon and ergosphere, it simultaneously reduces the extractable energy, and provides numerical results on the iterative evolution of the black hole's parameters under this process.
This paper presents exact solutions to the -dimensional Einstein Field Equations with a non-zero cosmological constant, derived using commuting constant matrices, which generalize well-known spacetimes like de Sitter, Anti-de Sitter, and Nariai metrics to higher dimensions and include applications in cosmology.
By incorporating semiclassical quantum effects that bound matter pressure, this paper demonstrates that gravitational collapse prevents the formation of a traditional black hole interior, instead resulting in a core with negative energy where matter density reaches the Planck scale as the star approaches the Schwarzschild radius.
This paper demonstrates that the wavefunction of the universe for conformally coupled scalars in power-law FRW cosmologies satisfies a graphical coaction that reveals its complete analytic structure through acyclic minors of Feynman graphs, thereby reproducing known kinematic flows and simplifying the extraction of discontinuities across all particle multiplicities and loop orders.
Motivated by quantum gravity on multi-scale geometries, this paper demonstrates that fractional field theories with a self-adjoint kinetic term possess a perturbative unitary spectrum consisting solely of standard asymptotic states, while all other modes manifest as purely virtual particles with complex masses.
This paper demonstrates that all planar black holes conformal to a Painlevé–Gullstrand line element can be realized as analogue metrics by constructing an explicit Lagrangian, while also introducing a concept of holographic entanglement entropy valid for arbitrary conformal and blackening factors.
This paper presents two novel analytic AdS black hole solutions in two-dimensional dilaton gravity with non-minimally coupled scalar fields, characterizing their causal structure, establishing consistent thermodynamics including the extremal case, and performing a holographic analysis that reveals a boundary effective theory described by a Schwarzian action supplemented by a mass term.
This paper investigates how anisotropic primordial power spectra from specific inflation models, such as Finslerian and gauge field inflation, influence scalar-induced gravitational waves, concluding that current pulsar timing array observations cannot yet rule out the existence of small-scale anisotropic primordial perturbations.
This paper extends the standard cosmological model within the quadratic energy-momentum squared gravity framework to analyze Big Bang Nucleosynthesis dynamics, deriving stringent constraints on the interaction parameter from primordial helium abundance measurements that either align with or deviate from standard cosmology depending on the dataset used.
This paper presents a visual approach to relativistic mechanics using Minkowski diagrams in energy-momentum space and hyperbolic trigonometry to derive elegant new formulations of the relativistic rocket equation and Doppler effect.