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.
This paper challenges the conventional view that black holes possess intrinsic entropy by employing a linear amplifier model to argue that black holes instead create and emit entropy during their operation, with the total emitted entropy matching the standard expression proportional to the square of the black hole's mass.
This study analytically investigates how the Hawking effect in a GHS dilaton black hole background influences the N-partite mutual information and relative entropy of coherence for bosonic and fermionic GHZ and W states, revealing that fermionic mutual information exceeds bosonic mutual information while the opposite trend holds for coherence, thereby highlighting the necessity of tailoring quantum resources to particle species and state structures in relativistic quantum information tasks.
This paper derives compact and accurate analytic expressions for the gravitational quasinormal modes of a regular black hole embedded in a Dehnen-type dark-matter halo, revealing that the axial perturbations split into non-isospectral "up" and "down" channels beyond the eikonal regime.
This paper presents the first of a three-part series detailing the overview, event selection, and general consistency tests of General Relativity using 91 confident gravitational-wave signals from the GWTC-4.0 catalog, finding no evidence for deviations from the theory in the dynamical and strong-field regime.
This paper presents parameterized tests of General Relativity using 91 confident gravitational-wave events from GWTC-4.0, finding no evidence for deviations from GR, spin-induced quadrupole anomalies, or line-of-sight acceleration, while significantly improving constraints on modified gravity theories and the graviton mass.
This paper presents seven tests of the remnants from 42 confident gravitational-wave events in GWTC-4.0, finding overall consistency with General Relativity and no evidence for post-merger echoes, while noting that apparent deviations in hierarchical analyses are likely attributable to statistical variance from the finite catalog size.
This study investigates the evolution of the Universe within a Bianchi type-I cosmological model incorporating Lyra's geometry and a scalar field, demonstrating that Lyra's parameter significantly influences the early universe while its effects diminish in the present era.
This paper investigates the Tsallis holographic dark energy model under power law ansatz across viscous, non-viscous, and Chaplygin gas scenarios, analyzing their stability and phantom divide crossing to conclude that the Chaplygin gas scenario offers superior insights into stability issues.
This paper demonstrates that certain holographic dark energy models can lead to a "long freeze" scenario where the universe asymptotically approaches a static state with vanishing energy density, a behavior that can persist after an extended period of exponential expansion but is generally disrupted by the presence of nonrelativistic matter.
This paper presents a fully covariant toy model where a closed FLRW spacetime emerges as a 4-brane within a flat five-dimensional scalar field space, driven by a string-like potential without requiring explicit curvature terms in the action.