3841 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 rigorously tests the restricted Quantum Focusing Conjecture (rQFC) by proving it in two-dimensional JT gravity models while providing counter-examples to the stronger original conjecture, and further derives a universal strengthened Quantum Null Energy Condition (QNEC) for higher dimensions that limits how rapidly the bound can saturate as transverse area vanishes.
This paper reviews recent advancements in constraining the dense matter equation of state by synthesizing heavy-ion collision and multi-messenger astrophysics data through three key frameworks—NMMA, MUSES, and BAND—and outlines a path toward integrating these methods into a unified workflow for precision nuclear physics.
This paper proposes a five-dimensional warped anti-de Sitter inflation model with a finite initial time, demonstrating that the interaction between a UV-brane-localized inflaton and a dynamically evolving IR brane produces a two-field hyperbolic inflation scenario that generates observable deviations in the cosmic microwave background, specifically a blue tilt in the adiabatic power spectrum and oscillatory features in the tensor spectrum at large scales.
This study investigates the entanglement entropy of analogue Hawking radiation in acoustic black holes surrounding a Schwarzschild black hole, demonstrating that the emergence of islands restores unitarity and yields a Page curve in the non-extremal case, whereas the extremal case results in divergent entropy.
By applying Israel junction conditions to a slowly rotating Kerr spacetime with a thin shell, this study reveals that the discontinuity in photon energy across the shell generates distinctive observational signatures, including double photon rings and step-like structures, which offer potential avenues for testing shell models and junction conditions through future astronomical observations.
This paper investigates the thermodynamic geometry, heat engine efficiency, and topological properties of charged AdS black holes within ModMax nonlinear electrodynamics coupled to dRGT massive gravity, incorporating Sharma–Mittal entropy corrections to analyze microscopic interactions, work conversion, and critical point structures.
This paper proposes a dark energy model within Unimodular Gravity where neutrino interactions mediated by a light scalar field generate dynamical dark energy with either monotonic or non-monotonic evolution, finding that such scenarios are compatible with current cosmological observations for specific neutrino mass and coupling ranges.
This paper demonstrates that Starobinsky inflation models featuring a stiff-fluid-dominated reheating phase, which are proposed to align with recent CMB+BAO data, are largely ruled out by Big Bang Nucleosynthesis constraints but remain testable through the detection of their predicted blue-tilted primordial gravitational-wave spectrum by future interferometers.
This paper analyzes two superconducting circuit analogues of Schwarzschild black holes to determine their viability for observing Hawking radiation, concluding that while a tunable dc-SQUID transmission line can achieve distinguishable Hawking temperatures around 113 mK under realistic dissipative conditions, the solitonic SNAIL-based model requires further optimization.
This paper investigates whether the condition that all null geodesics departing from and returning to conformal infinity in an asymptotically anti-de Sitter spacetime refocus at an antipodal point implies that the spacetime is conformal to anti-de Sitter space, providing affirmative answers for cases satisfying the null energy condition, being static, or being globally stationary.