3256 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 investigates the shadow and polarization images of a Kerr-Sen black hole illuminated by thick accretion disks using RIAF and BAAF models, revealing that increasing black hole charge shrinks the shadow and photon rings while spin and inclination enhance brightness asymmetry and influence polarization patterns through gravitational lensing and frame dragging.
This paper presents a systematic construction of exact anisotropic Lifshitz-like black brane solutions in arbitrary spacetime dimensions using two distinct holographic models, demonstrating that while the third law of thermodynamics holds for certain parameter ranges, specific configurations can lead to non-monotonic entropy-temperature relations indicative of phase transitions and potential violations of the law.
This paper proposes a new class of co-located, non-coplanar "Pyramid" interferometers that geometrically isolate cosmological gravitational wave chirality, thereby overcoming the limitations of planar detector networks to provide a unique terrestrial pathway for testing parity violation in the early Universe.
This paper investigates how non-standard reheating dynamics and primordial non-Gaussianity imprint characteristic features on the scalar-induced gravitational wave spectrum, demonstrating that these signals are potentially detectable by future interferometers like LISA and can be constrained through Fisher forecasts.
This paper demonstrates that the gravitational wave background from supermassive black hole binaries exhibits a universal heavy-tailed non-Gaussian distribution with diverging higher-order moments, necessitating a factored likelihood approach that combines Gaussian-process posteriors with a non-Gaussian population prior for accurate model inference.
This paper introduces a metric-affine gravity model that enforces classical chronology protection by dynamically generating a global time function through the breaking of projective invariance, thereby recovering mimetic gravity as a special case while naturally producing a broader dark sector.
This paper utilizes the Kosambi-Cartan-Chern theory to conduct a comparative analysis of Jacobi and Liapunov stability for geodesics around rotating black holes in dynamical Chern-Simons gravity, demonstrating the advantages of the geometrical Jacobi approach over the traditional Liapunov method.
This paper investigates the finite-time transition probability rate of a uniformly accelerating Unruh-DeWitt detector, demonstrating that it comprises time-independent thermal terms and oscillatory non-thermal transient terms, and derives the specific thermalization times required for the non-thermal contributions to become negligible in both small and large acceleration regimes.
This paper proposes a novel mechanism where vacuum fluctuations in the presence of scalar metric perturbations after inflation generate a distinct gravitational wave spectrum peaking in the GHz frequency range, necessitating high-frequency detectors for observation.
This paper reviews the basic definitions and properties of QFT vector models, a newly developed approach to quantum gravity based on induced gravity in discrete spacetimes, while outlining directions for future research.