3875 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 utilizes the cosmological bootstrap framework to establish criteria distinguishing when boundary terms in quasi-de Sitter spacetime yield non-vanishing contributions to cosmological correlators, applying these insights to systematically classify and extract boundary effects in both dS-invariant and boost-breaking massive-exchange scenarios.
This paper investigates realistic neutron star models within the framework of gravity using the Krori-Barua metric and a linear function, demonstrating that four specific pulsars satisfy Buchdahl's limit and exhibit statistical consistency with observational data through Chi-Square analysis.
This paper presents the first fully Bayesian study demonstrating that the Einstein Telescope will be capable of detecting tidal resonances in binary neutron stars with high sensitivity, thereby enabling asteroseismology and preventing biases in inferred tidal deformabilities.
This paper presents the strongest constraints to date on ultralight axions in the mass range to eV using gravitational lensing data from Planck, ACT, and SPT-3G, finding that such axions can constitute at most a few percent of dark matter while noting a tentative preference for their existence at eV that warrants further investigation.
This paper utilizes the Teleparallel Equivalent of General Relativity (TEGR) to demonstrate that the collision of two sandwich gravitational waves results in the creation of gravitational energy, thereby resolving longstanding issues regarding energy conservation in colliding pp-wave spacetimes identified by Szekeres.
Using four-dimensional causal dynamical triangulation simulations, this paper presents evidence for the existence of massive geons—self-bound graviton states—through curvature-curvature correlators, suggesting potential implications for dark matter and primordial black holes while noting a connection between their mass and the expansion phase of the de Sitter universe.
This study employs a Bayesian framework to demonstrate that while spaceborne detectors like LISA, Taiji, and TianQin can detect the stochastic gravitational-wave background from isolated and globular cluster-formed eccentric stellar-mass binary black holes, only the background from highly eccentric binaries in active galactic nuclei exhibits a unique spectral turnover that allows for clear distinction from power-law backgrounds.
Using exact WKB analysis and numerical verification, this paper demonstrates that while Schwarzschild black holes exhibit convergent real parts for high-overtone quasinormal modes, parametrized deviations from general relativity generically cause these frequencies to diverge, highlighting spectral instability as a distinctive feature of modified gravity theories.
This paper demonstrates that exponential teleparallel gravity is a viable cosmological model by reconstructing its Hubble expansion history and confirming its consistency with recent observational data, including OHD, DESI DR2 BAO, gravitational-wave standard sirens, and Type Ia supernovae, through statistical analyses and dynamical stability checks.
This paper utilizes the Teleparallel Equivalent of General Relativity to compute the second-order gravitational energy of axial perturbations in regular black holes, establishing a direct link between their dynamical response via quasinormal modes and the energy carried by these fluctuations.