2558 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 proposes a -inflation framework with a field-dependent kinetic term that resolves tensions between -attractor T-models and natural inflation with recent ACT data by shifting them into favored observational regions, while simultaneously satisfying Swampland conjectures and predicting distinct gravitational-wave signatures for future detection.
This paper demonstrates that scalar-nonmetricity gravity, through specific nonminimal couplings between a scalar field and the nonmetricity scalar, provides a viable and robust framework for successfully reproducing the observed baryon asymmetry of the Universe without requiring fine-tuning of parameters.
This paper investigates the dynamics of spinning charged test particles around a Schwarzschild black hole in a uniform magnetic field, deriving analytical solutions for integrable equatorial motion while revealing chaotic behavior in non-integrable off-equatorial regimes through numerical phase space analysis.
This paper demonstrates that the gravitational spin Hall effect induces helicity-dependent corrections to black-hole shadows, causing polarized light of opposite spins to trace slightly different boundaries even in static spacetimes, thereby revealing that these shadows are not purely geometric observables.
This paper introduces a machine learning framework that utilizes convolutional neural networks trained on response function observables to significantly enhance the classification of gravitational wave signals for testing general relativity, achieving a 33-fold improvement in sensitivity over standard waveform inputs and successfully detecting deviations in massive gravity theories.
This paper investigates a generalized entropic cosmology with a viscous dark fluid and Hawking radiation, demonstrating that thermal effects can either soften the predicted Big Rip singularity or cause it to vanish entirely.
This paper introduces an analytic framework for gravitational lensing in hadronic media by modeling hadrons via a nonlinear sigma model coupled to Maxwell theory, demonstrating that photons acquire an effective mass and deviate from null geodesics, which allows for the derivation of a modified Raychaudhuri equation and the calculation of deflection angles without relying on phenomenological refractive index models.
This paper re-derives gauge-invariant stochastic inflation equations incorporating all metric and scalar degrees of freedom, validates their numerical implementation within the BSSN formulation of Numerical Relativity across slow-roll and ultra slow-roll scenarios, and demonstrates their robustness in simulating fully non-linear stochastic dynamics with retained gradients and anisotropic expansion.
This work calculates the static Love numbers for scalar and Dirac perturbations of acoustic black holes in (3+1) and (2+1) dimensions and shows that while scalar responses exhibit dimension-dependent behavior, including vanishing for certain modes, fermionic responses universally follow simple power laws, thereby highlighting fundamental qualitative differences between integer- and half-integer-spin fields in analog gravity systems.
This paper demonstrates that non-orientability imposes intrinsic global topological obstructions on the existence of signature-changing semi-Riemannian metrics, specifically proving that the radical of such metrics cannot be everywhere transverse to the signature-change locus on compact non-orientable surfaces.