2489 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 spherically symmetric general relativistic Bondi accretion with a position-dependent adiabatic index by classifying its transonic solutions via dynamical systems theory, demonstrating their linear stability, and deriving the corresponding emergent acoustic spacetime and its causal structure to bridge astrophysical, dynamical, and analogue gravity perspectives.
This paper proposes a minimal predictive cosmological model where cosmic acceleration emerges naturally from quantum post-selection and coarse-graining, offering a statistically competitive alternative to the CDM model without requiring a cosmological constant, dark energy, or modified gravity.
This paper demonstrates that quadratic modified teleparallel gravity provides a self-consistent framework for nonsingular bouncing cosmology, where dynamical system analysis confirms a smooth transition from contraction to expansion without singularities, featuring a phantom-like phase and a stable late-time attractor.
This paper demonstrates that by developing a rigorous model accounting for vacuum state mixing from diffraction losses, optical springs combined with homodyne detection can effectively reduce quantum noise in the DECIGO space-based gravitational wave observatory, although achieving the sensitivity required to detect primordial gravitational waves remains limited by other technical noises.
This paper develops a canonical Post-Newtonian Hamiltonian framework for radiating charges by integrating the Landau-Lifshitz reduced radiation reaction force with the Darwin Hamiltonian to derive inspiral laws for charged binaries, extending the analysis to Einstein-Maxwell theory to establish gauge-invariant energy-frequency relations and identify the crossover scale between electromagnetic dipole and gravitational quadrupole flux dominance.
This paper introduces a patch-level scoring architecture using frozen DINOv2 and vector-quantized local feature indexing to overcome the signal dilution limitations of global CLS token metrics, thereby enabling unsupervised detection and topological localization of diverse gravitational-wave glitches in LIGO O4a data.
This paper proposes that long-baseline atom interferometers like MAGIS and AION can serve as sensitive non-collider probes for supersymmetric hidden sectors by detecting coherent phase oscillations induced by ultralight moduli or hidden scalars, thereby mapping these signals to fundamental parameters of supersymmetric and string-motivated theories.
This paper demonstrates that a locally static Schwarzschild spacetime can be consistently embedded within a generalized cosmological time (GCT) background with an evolving lapse by satisfying Israel junction conditions, which yield a geometric consistency condition rather than new dynamics, thereby ensuring compatibility between local gravitational stability and non-standard cosmological time normalizations.
The paper demonstrates that existing radio telescopes like CHIME and FAST can effectively detect high-frequency gravitational waves from sources such as primordial black hole mergers and ultralight boson clouds by converting them into radio photons via the inverse Gertsenshtein effect, significantly outperforming many current experiments in this frequency regime.
This paper proposes that a neighboring brane-world could communicate with ours exclusively through gravity by utilizing the Kaluza-Klein tower as a multi-input multi-output channel, where information is encoded in the occupation patterns, phases, and arrival times of massive graviton modes above a specific energy threshold.