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 investigates how non-standard reheating dynamics and primordial non-Gaussianity imprint characteristic features on the scalar-induced gravitational wave spectrum, demonstrating that these signals are potentially detectable by future interferometers like LISA and can be constrained through Fisher forecasts.
This paper demonstrates that the gravitational wave background from supermassive black hole binaries exhibits a universal heavy-tailed non-Gaussian distribution with diverging higher-order moments, necessitating a factored likelihood approach that combines Gaussian-process posteriors with a non-Gaussian population prior for accurate model inference.
This paper investigates the finite-time transition probability rate of a uniformly accelerating Unruh-DeWitt detector, demonstrating that it comprises time-independent thermal terms and oscillatory non-thermal transient terms, and derives the specific thermalization times required for the non-thermal contributions to become negligible in both small and large acceleration regimes.
This paper investigates how deviations from spherical symmetry in the -metric alter the properties of periodic orbits and their associated gravitational waveforms, demonstrating that precise measurements of waveform morphology from extreme-mass-ratio inspirals could constrain the deformation parameter .
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.