3342 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 computes the quasinormal mode frequencies of neutral scalar perturbations in extremal Reissner-Nordström black holes by mapping their master equation to the quantum Seiberg-Witten curve of gauge theory with two flavors, utilizing the Nekrasov-Shatashvili limit to derive non-perturbative analytical results that match numerical benchmarks and capture quasi-resonance behavior.
This paper reviews recent findings on the preheating phase of Einstein-Cartan Higgs inflation, highlighting how the theory's intermediate regime leads to the formation of transient oscillons via tachyonic instabilities and nonlinear interactions, which subsequently decay to initiate radiation domination and influence the Universe's thermal history and gravitational wave generation.
This paper primarily uses visualizations constructed from concrete metric tensor fields to illustrate the conceptual foundations leading to Gödel's rotating cosmological model, with technical details provided in the final chapters.
By cross-correlating Planck and WMAP maps with the 2MRS galaxy catalogue, this study reveals a statistically significant, morphology-dependent temperature decrease of approximately 15 μK in the cosmic microwave background around nearby extended galaxies, indicating the presence of previously unaccounted foregrounds that impact cosmological analyses and offer new avenues for probing the intergalactic medium.
This paper proposes that a newly detected foreground effect, characterized by systematic CMB temperature decrements around nearby large spiral galaxies, provides a common explanation for several large-scale CMB anomalies, including the Cold Spot and low-multipole correlations, suggesting that current cosmological parameters may require revision once this foreground is properly accounted for.
This paper argues that the anomalous CMB Cold Spot can be explained by a local extragalactic foreground effect, specifically a strong temperature decrement caused by the unique concentration of nearby spiral-rich galaxy groups and HI-deficient galaxies in the Eridanus supergroup, rather than by new physics or a high-redshift cosmic void.
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.