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 preliminary study compares the Nonminimal Derivative Coupling models utilizing the trace of the stress-energy tensor (NMDC-T) and a real-valued scalar field (NMDC-phi) within incompressible stars, finding that the NMDC-T model's coupling parameters are less sensitive to variations in compactness and mass-radius relations than those of the NMDC-phi model.
This paper introduces a new almost universal metric class by demonstrating that nonzero constant curvature pp-wave metrics, which possess an topology and reduce generic gravity equations to cosmological Einstein-Maxwell theory with null dust, serve as the missing partner to the Nariai and Bertotti-Robinson metrics.
This paper analyzes the shadow and energy emission of a rotating Bardeen black hole with a magnetic monopole charge within asymptotically safe gravity, finding that increasing the asymptotic safety and spin parameters reduces the shadow size while increasing its distortion.
This paper investigates how the Kalb-Ramond field and perfect fluid dark matter parameters influence the optical appearance and ringdown dynamics of static spherically symmetric black holes, revealing significant observational signatures for constraining Lorentz-violating effects and dark matter environments in strong-gravity regimes.
This paper clarifies that while both local Rindler horizon and cosmological apparent horizon approaches in modified gravity utilize non-equilibrium thermodynamic relations, the origin, role, and dynamical impact of their respective entropy-production terms are fundamentally distinct, underscoring the non-uniqueness of thermodynamic descriptions in theories beyond general relativity.
This paper investigates gravitational wave production during the preheating era within a Gauss-Bonnet inflation model featuring a power-law potential and monomial coupling, demonstrating that the predicted gravitational wave energy density is consistent with Planck observational constraints under specific coupling, equation of state, and efficiency parameters.
This paper demonstrates that in noncommutative spacetime, the interaction between Hawking radiation and a collapsing shell is modified such that radiation decays significantly after the scrambling time, leading to an exponentially long black hole evaporation process.
This paper derives exact uncertainty relations for the hydrodynamic density and phase variables of quantum fields in curved spacetime, demonstrating how gravitational geometry modulates quantum fluctuations and offering new constraints for scalar field dark matter and stochastic quantum gravity models.
This paper constructs explicit planar Anti-de Sitter spacetimes with multiple NUT parameters by introducing axionic scalar fields or quadratic-curvature corrections, thereby overcoming vacuum field equation restrictions and enabling the study of holographic properties with multiple NUT charges alongside Kaluza-Klein multi-monopole configurations.
This paper proposes a novel experimental setup where a charged Weber bar inside a shielded cavity interacts with gravitational waves via a semi-classical analogue of the Gertsenshtein effect, causing the bar to emit detectable photons as a means of gravitational wave detection.