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 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.
This paper demonstrates that coupling an accelerated Unruh-DeWitt detector to a massless scalar field via a quadratic interaction, rather than the usual linear coupling, significantly mitigates decoherence and enhances the coherence, stability, capacity, and efficiency of the quantum battery, particularly when the detector possesses orthogonal velocity components.
This paper comprehensively analyzes late-time cosmic scenarios, particularly rips, within a holographic dark energy framework using both primitive and generalized Nojiri-Odintsov cutoffs, while evaluating the validity of thermodynamic laws and energy conditions to demonstrate that consistent alternatives to the Big Rip are unattainable with simpler cutoffs but possible with the generalized approach.
This paper proposes that astrophysical black holes (ABHs) without event horizons provide a more viable explanation for long-term galaxy quenching than classical black holes, due to their ability to generate significantly stronger accretion disk winds and more efficient feedback mechanisms.