2593 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 develops and validates a fullshape galaxy power spectrum pipeline for the Symmetron modified gravity model using perturbation theory and MCMC analysis, demonstrating its viability and similarity to the Hu-Sawicki F6 model through comparisons with EZMock simulations.
This paper proposes a theoretical experimental scheme using quantum clock interferometry to detect post-Newtonian frame-dragging effects and test the quantum equivalence principle via gravity-induced entanglement, offering a pathway for future investigations into the intersection of quantum mechanics and general relativity despite current technological limitations.
This paper generalizes de Sitter holography to geometries with a bubble of smaller or vanishing cosmological constant, proposing that the spacetime is encoded on two holographic screens when the observer's causal patch overlaps with the parent region, while requiring additional screens when they are causally disconnected.
This paper develops a second-order cosmological perturbation theory on a light-cone background, establishing a gauge-invariant framework that connects to the Observational Synchronous Gauge and successfully computes the luminosity distance-redshift relation up to second order while eliminating observer-position divergences in a model-independent manner.
This paper argues that effective field theories with light scalars can achieve UV completion through classicalization, a mechanism relying on the synergy between Vainshtein and chameleon screening to generate semi-classical objects that resolve hierarchy problems via UV/IR mixing.
This paper investigates the imaging signatures of dynamical thin-shell Schwarzschild spacetimes by analyzing null geodesic refraction and light travel time delays, revealing distinct features such as redshift cusps, V-shaped transfer functions, and the decoupling of photon spheres from observable photon rings that serve as practical tests for Israel junction conditions.
This paper embeds covariant gravitational radiation criteria into the gauge/gravity duality framework to establish a correspondence between bulk gravitational waves and boundary dissipative processes, ultimately deriving a Carrollian fluid description with natural entropy production in the flat limit.
This paper proposes GravNet, a conceptual design for a global network of geographically separated detectors operating in strong magnetic fields to search for high-frequency gravitational waves (MHz to GHz) by synchronizing measurements to distinguish signals from noise and enhance detection significance.
This paper argues that while conventional quantum mechanics requires an anti-unitary time-reversal operator in orientable spacetimes to preserve energy positivity and commutation relations, spacetimes with non-orientable topology enable a purely unitary time-reversal operator by encoding the symmetry through geometry, thereby allowing for negative energy states.
This paper proposes a simple spin-measurement technique for M87* that utilizes high-resolution astrometry to detect the displacement between the direct image and the first lensed photon ring sub-image, demonstrating that a relative resolution of can constrain the black hole's spin to within 9–26% without relying on geometric modeling of the emission.