3875 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 exact, horizonless traversable wormhole solutions in massive gravity by combining a perturbative dRGT graviton-mass term with various redshift profiles, demonstrating that the additional anisotropic pressure from the mass term can sustain the wormhole throat while satisfying or minimally violating energy conditions.
This lecture evaluates the performance of the standard FLRW cosmological model in predicting cosmic expansion and light propagation, while presenting results on the challenges posed by backreaction and fitting problems when moving beyond strict homogeneity and isotropy.
This paper presents a mathematical framework that extends symmetry reduction to classical field theories using the De Donder-Weyl formalism and multisymplectic geometry, allowing for the identification and removal of redundant degrees of freedom associated with global scale while maintaining Lorentz covariance.
This paper investigates the macroscopic backreaction of quantum fields in the Boulware vacuum on Schwarzschild spacetime by applying an order-reduction procedure to the Riegert–Mottola–Vaulin renormalized stress-energy tensor derived from the conformal anomaly, while ensuring stress-energy conservation and comparing the results with recent literature.
This paper investigates the spectral stability of total transmission modes in -dimensional Tangherlini black holes using pseudospectrum analysis, revealing that while these modes are generally unstable like quasinormal modes, a specific purely imaginary mode exhibits enhanced stability and that genuinely complex families emerge in dimensions .
Using the DESI DR1 Luminous Red Galaxy sample, this study finds that apparent parity-odd four-point correlation signals are likely statistical artifacts rather than evidence of new physics, concluding that the current signal is consistent with zero while highlighting the need for higher-completeness future data releases to improve detection sensitivity.
This paper presents an explicit closed-form description of dynamical extreme Reissner-Nordstrom black holes by utilizing two-dimensional Jackiw-Teitelboim gravity to model non-linear s-wave dynamics near an throat, demonstrating how these singularity-free solutions approach a static extreme horizon while exhibiting the linear Aretakis instability and emitting a final burst of scalar flux.
This paper investigates a two-field quintom dark energy model with exponential and inverse power-law potentials, demonstrating through dynamical system analysis that it possesses stable phantom-dominated attractors which are observationally favored by recent DESI DR2 and other cosmological data, while exhibiting a gradual phantom divide crossing consistent with deviations from a cosmological constant.
This paper formulates a scalar Machian theory of gravity within the Bergmann-Wagoner framework that implements Sciama's causal postulate as a selection rule for retarded solutions, thereby deriving the cosmological inertial scale from local matter distributions while remaining consistent with standard weak-field tests and the Equivalence Principle.
This tabletop study experimentally validates a proposed kilohertz gravitational-wave detector topology by demonstrating that an L-shaped cavity pumped via a Sagnac-like vortex exhibits a simple Michelson-like response with a transparent input coupler and independent upper/lower pumping paths, thereby confirming theoretical predictions and informing future lock acquisition strategies.