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.
This paper establishes a novel, bidirectional equivalence between scale-dependent gravity and specific scalar-tensor theories, demonstrating that the scale-setting relation can be promoted to a dynamical field and that these frameworks can be uniquely embedded into one another at both the action and field equation levels.
This paper elucidates the connections between auxiliary field formulations of four-dimensional duality-invariant electrodynamics and two-dimensional integrable sigma models by demonstrating that their relationships are governed by Legendre transformations and field redefinitions, thereby establishing correspondences between specific formalisms and extending known families of integrable deformations.
This paper establishes a universal lower bound for the photon sphere radius in static, spherically symmetric, asymptotically flat black holes of arbitrary dimension under specific energy and pressure conditions, proving that and thereby generalizing Hod's four-dimensional theorem to higher dimensions.
This paper derives the gravitational energy-momentum pseudo-tensor for non-metric gravity, establishes its local conservation, draws analogies with gravity, and applies the formalism to analyze gravitational wave power and the energy density of Schwarzschild spacetime.
This paper demonstrates that Mineur--Vaidya radiating solutions can be consistently embedded within Entangled Relativity and other Einstein--Maxwell--dilaton theories as limits of vanishing electromagnetic fields, thereby proving that these frameworks, like General Relativity, permit the dynamical formation of naked singularities.
This paper theoretically investigates the gravitomagnetic Aharonov-Bohm effect for Cooper pairs in Kerr spacetime, deriving a gauge-invariant phase shift induced by black hole frame-dragging that predicts enormous phase values near supermassive black holes like Sgr A* and M87*, thereby establishing a quantitative link between quantum coherence and strong-field gravity.
This paper proposes a complex scalar field inflation model with nonminimal coupling to gravity, demonstrating that a non-Hermitian imaginary potential component can drive efficient geometric reheating while maintaining standard -attractor inflationary predictions consistent with Planck 2018 data.
This paper analytically investigates scalar superradiant scattering in rotating dyonic Kerr-Sen black holes using the asymptotic matching method, revealing that while electric and magnetic charges suppress amplification compared to the Kerr limit, lighter co-rotating scalar fields enhance energy extraction efficiency within the derived superradiant condition.
This paper utilizes the observed 11-year jet precession period of M87* to constrain the parameters of a rotating black hole in Bumblebee gravity, demonstrating how Lorentz-symmetry breaking affects spherical orbits and innermost stable spherical orbits, and suggesting that a warp radius exceeding 16 may indicate the presence of a non-vacuum Bumblebee vector field when combined with EHT shadow constraints.
This paper proposes that quantum entanglement between primordial gravitons in decoupled gravitational sectors can parametrically enhance the tensor power spectrum, thereby evading the Lyth bound to allow for a detectable tensor-to-scalar ratio with sub-Planckian inflaton excursions while predicting unique observational signatures such as oscillatory power spectrum features and late-time gravitational wave noise.