3949 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.
Using the clear gravitational wave signal GW250114, this study performs the most precise tests of general relativity in the nonlinear strong-gravity regime to date by constraining deviations in spin-precessing binary black hole mergers to significantly tighter limits than previous analyses of GW150914.
This paper investigates the existence and viability of three-dimensional black bounce solutions in gravity, analyzing their generalization from general relativity, constructing new zero-curvature solutions supported by scalar-nonlinear electrodynamics couplings, and evaluating the associated energy conditions and scalaron mass behavior.
This paper investigates the optical properties and Hawking radiation characteristics of Skyrmion black holes, demonstrating how the Skyrme term and geometric parameters influence the photon sphere, shadow shape, and energy emission spectra to provide potential observational signatures of nonlinear field effects in modified gravity.
The CHRONOS paper proposes a novel ground-based cryogenic torsion-bar detector utilizing a Sagnac speed-meter readout to overcome seismic and quantum noise limitations, thereby enabling sub-Hz gravitational-wave observations of intermediate-mass black holes and stochastic backgrounds in the currently unexplored frequency band between space-based and ground-based interferometers.
This paper presents a fully nonlinear numerical study of black hole-boson star binaries, demonstrating that using equilibrated initial data is crucial for accurate gravitational waveforms, that radiative efficiency in head-on collisions depends significantly on the scalar potential, and that appropriate self-interactions can suppress tidal disruption during inspiral, with important implications for building model-agnostic waveform templates for exotic compact objects.
This paper constructs static, spherically symmetric charged black hole solutions in quasi-topological gravity coupled to Born-Infeld electrodynamics, revealing that while certain models yield regular black holes with an anti-de Sitter core, others develop curvature singularities at finite radii.
This paper employs Markov Chain Monte Carlo analysis with recent high-precision observational datasets to demonstrate that a canonical exponential quintessence model remains statistically comparable to the standard CDM cosmology while successfully reproducing cosmic acceleration and satisfying key physical viability conditions.
This paper proposes a Hamiltonian composite theory of gravity derived from local Lorentz gauge symmetry and freely falling frames, demonstrating that it yields an exact black-hole solution, possesses only four physical degrees of freedom for planar gravitational waves, and provides a framework for quantization.
This paper presents a gauge-independent general relativistic derivation showing that optically levitated sensors in Fabry-Pérot cavities exhibit an asymmetric gravitational wave response maximized near the input mirror, a configuration that simultaneously suppresses noise coupling from input-mirror displacements to establish key design principles for high-frequency gravitational wave detectors.
This paper demonstrates that the BEF symplectic form for non-local theories can be derived from an -Lagrangian via the covariant phase space approach, establishing its equivalence to the Barnich--Brandt form for second-order theories and providing a unified framework for understanding corner terms, boundary conditions, and Hamiltonians.