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 extends a previous quantum information-based analysis of gravity by incorporating leading-order post-Newtonian corrections to a Bose-Einstein condensate detector model, demonstrating that while these relativistic effects slightly dampen the signal-to-noise ratio, non-Gaussianity remains a unique signature of quantum gravity that can be isolated from electromagnetic interactions via Feshbach resonances.
This paper demonstrates that the canonical Weyl coordinate choice is incompatible with a non-zero cosmological constant because the area function ceases to be harmonic, thereby clarifying that the restriction on Weyl metrics applies specifically to the coordinate system rather than to static axisymmetric Einstein spaces in general.
This paper introduces quantum reference fields within linearized quantum gravity to formulate a relational description of spacetime, deriving unitary transformations that implement local quantum coordinate changes between different internal perspectives and demonstrating how these relational observables can be accessed operationally.
This paper resolves discrepancies in the literature regarding the effective scalaron-photon coupling in gravity by demonstrating that the trace anomaly, arising from the transformation between Jordan and Einstein frames, cancels the diagrammatic contribution in the limit of light scalaron mass, thereby leading to a vanishing effective coupling and a suppressed decay rate into photons.
This paper critiques existing semi-classical and quantum gravity frameworks to propose a teleparallel approach based on coframe and spin-connection variables, arguing that encoding gravity in torsion offers a geometrically refined foundation for future quantum gravity investigations.
By applying redshift-dependent corrections for progenitor age to the Pantheon+ supernova catalogue, the study reveals that the universe's monopole deceleration parameter shifts to positive values, indicating cosmic deceleration while leaving the local dipole anisotropy unchanged.
This paper demonstrates that stationary scalar clouds around a rotating Kalb-Ramond BTZ black hole are jointly determined by the Kalb-Ramond parameter, rotation, and Robin boundary conditions, with the Kalb-Ramond parameter qualitatively altering the existence lines of these clouds by introducing nonmonotonic behavior for positive values and shifting the critical boundary parameters.
This paper develops a modified Teukolsky formalism to model gravitational wave generation and fluxes from extreme mass-ratio inspirals into non-rotating black holes within higher-derivative gravity theories, providing a foundational step for constructing waveforms in modified gravity that can also approximate comparable-mass binary systems.
This paper establishes a general framework for analyzing quantum scalar fields in warped geometries containing topological defects by decomposing curvature, separating field equations, and deriving normalized mode functions to evaluate the Hadamard two-point function in specific cases like global monopoles in AdS spacetime.
This paper demonstrates that evaporating black hole populations with finite-width mass distributions universally exhibit a characteristic power-law suppression in their induced gravitational wave backgrounds at late times, a phenomenon driven by evaporation dynamics rather than initial mass distribution details.