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 proposes that a transient violation of the null energy condition during inflation generates primordial black holes and a distinctive, multi-component stochastic gravitational wave background, offering a novel pathway to constrain early-universe physics through future multi-band gravitational wave observations.
This paper critically classifies and demystifies warp-drive spacetime models within General Relativity, exposing misconceptions in the literature and proving new no-go theorems that demonstrate the extreme difficulty of justifying their physical viability beyond mere energy condition violations.
This paper establishes a cosmological CPT theorem by demonstrating that a symmetry group, where any two discrete symmetries (including Reflection Reality and CRT) imply the third, allows for the non-perturbative determination of wavefunction coefficient phases in de Sitter spacetime without analytic continuation, thereby providing a powerful tool for de Sitter holography.
This paper presents an analytical framework linking the logarithmic divergence rate of photon deflection angles in the strong deflection limit to local, coordinate-invariant matter properties via the Einstein tensor, thereby resolving the puzzle of the universal value in massless scalar field spacetimes and revealing a deep connection between strong gravitational lensing and quasinormal mode frequencies.
This paper demonstrates that incorporating finite-temperature quantum field theory corrections, specifically new density parameters and , into the CDM model improves its fit to Planck 2018 CMB data and statistical performance compared to the standard model.
This paper derives the anomaly equation for large U(1) chiral symmetry by heuristically constructing large chiral charges, verifying the result through one-loop diagrammatic calculations and the Fujikawa method, and discussing the consequent breaking of unitarity and low-energy effective models.
This paper employs artificial neural networks and stochastic optimization to analyze finite-temperature quantum gravity effects on cosmological parameters, demonstrating that incorporating new temperature-dependent density terms improves the fit to Planck data and suggests a non-negligible role for thermal quantum corrections in cosmological evolution.
This paper demonstrates that a cosmologically subdominant but highly collisional dark matter species can accumulate and become dominant within the deep gravitational wells of compact objects like white dwarfs and neutron stars due to gravothermal pile-up.
Using fully nonlinear numerical relativity simulations with two different Einstein equation formulations, the study finds no evidence of instability in ultracompact spinning boson stars with stable light rings over timescales of scalar mass units, even when subjected to various perturbations that decay slowly without triggering immediate collapse.
This paper demonstrates that astrophysical environments surrounding rotating black holes break spacetime symmetries, inducing chaotic orbital dynamics and extending the lifespan of resonant islands in extreme-mass-ratio inspirals, which creates distinct imprints on gravitational-wave signals that challenge current vacuum-based modeling and parameter inference.