3773 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 dynamics of a neutral scalar particle in a charged traversable wormhole background by solving the Klein-Gordon equation with harmonic and modified oscillator couplings, revealing that the wormhole's charge indirectly influences the bound-state energy spectrum and quantized frequencies through spacetime geometric deformation.
This paper introduces the IKKT matrix model as a framework for fundamental physics, demonstrating how specific noncommutative matrix backgrounds can emerge as expanding 3+1-dimensional spacetimes that naturally give rise to gauge fields and a modified theory of quantum gravity while relying on maximal supersymmetry to ensure effective locality.
This paper demonstrates that a regular Euclidean-Lorentzian signature transition is possible in scalar-tensor gravity with dynamical gravitational coupling, revealing that while the existence of such a transition is frame-independent, its extrinsic geometry and resulting cosmological behaviors (such as effective phantom evolution) are intrinsically frame-sensitive.
This paper proposes that supermassive black holes in JWST-discovered "little red dots" originate from runaway mergers of primordial black holes within small-scale clusters, a mechanism that simultaneously explains their observed mass and compactness while alleviating tensions with high-redshift galaxy formation in CDM cosmology.
This paper introduces a hierarchical Bayesian framework that directly models the supermassive black hole binary merger-rate density within Pulsar Timing Array likelihoods, enabling the inference of population parameters from both stochastic background signals and individual merger candidates without relying on fixed detection thresholds.
This paper investigates generalized Eddington–Finkelstein coordinates to derive, classify, and analyze both vacuum and non-vacuum Vaidya-type solutions with spherical, hyperbolic, and planar symmetries in Weyl conformal gravity, highlighting their structural non-triviality and key properties such as singularities, horizons, and gauge equivalence to Einstein spaces.
This paper characterizes specific cases of generalized quasi-Einstein manifolds, demonstrating that those admitting a parallel time-like vector field correspond to generalized Robertson-Walker, Robertson-Walker, and quasi-constant curvature spacetimes, while also analyzing their physical implications and energy conditions within the framework of F(R)-gravity.
This paper introduces a new formalism for black hole thermodynamic topology based on off-shell grand free energy, which defines an asymptotic topological flux determined by background spacetime geometry and conjectures this flux as a spacetime invariant that reveals a nontrivial flat-space limit of AdS.
This paper revises forecasts for using strongly lensed binary-black-hole mergers to constrain cosmological parameters by incorporating detector selection effects, demonstrating that the upgraded LVK network could detect dozens of such events to enable modest cosmological constraints, while confirming that earlier forecasts for next-generation detectors remain valid.
This paper employs an exact inhomogeneous -Szekeres spacetime model with axisymmetric expansion to describe the local Universe, demonstrating that its derived covariant cosmographic parameters align with observational constraints while establishing a connection between relativistic solutions and Newtonian gravitational potentials.