3285 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 provides a comprehensive introduction to Lorentz-Finsler geometry, reviewing its foundational concepts, global structures, and diverse applications in physics and classical mechanics, while also presenting new results such as the splitting of globally hyperbolic Finsler spacetimes and the analysis of timelike boundaries.
This study extends the investigation of critical collapse in axisymmetric massless complex scalar fields to higher angular modes () using a novel -cartoon symmetry reduction, revealing that while discrete self-similarity and universality persist within each mode, the critical exponents depend explicitly on and extremal black holes are excluded at the threshold.
This paper presents a fully relativistic framework for modeling the tidal response of compact stars by matching interior fluid dynamics to near-zone spacetime perturbations, thereby avoiding quasinormal mode summations and providing numerical results for realistic equations of state while connecting to field-theoretic scattering amplitudes.
This paper establishes a quantum optical framework for probing black hole quasinormal modes by deriving detector response functions and a Dicke-type master equation, thereby linking the imaginary parts of QNM frequencies to lasing thresholds and offering a unified language for black hole spectroscopy in the gravitational-wave era.
This paper investigates relativistic tidal forces around a Letelier-Alencar cloud of strings black hole, revealing that the string cloud parameter significantly alters curvature divergence, orbital stability, and tidal force profiles, including potential inversions in stretching and compression regimes hidden within the event horizon.
This paper demonstrates that assumptions about dark sector equations of state critically determine the inferred strength and direction of dark matter-dark energy interactions, revealing that fixing these parameters to standard CDM values creates a misleading preference for energy transfer from dark energy to dark matter, whereas freeing them exposes significant degeneracies and shifts the evidence toward quintessence-like behavior or different interaction directions depending on the specific parameter relaxed.
This paper establishes the first geometric optimal control theory for the (2+1)-dimensional BTZ black hole by applying a finite-time optimization framework to construct geodesic trajectories that define optimal thermodynamic protocols connecting distinct states while extremizing entropy production or energy dissipation.
This paper presents a highly sensitive search for a stochastic gravitational-wave background using combined data from five pulsar timing arrays and a novel direct combination method, which reveals Hellings-Downs correlations and a nonzero amplitude consistent with a background signal but falls short of the conventional threshold for a confident detection.
This study evaluates a four-parameter dynamical dark energy model using the latest cosmic probes (Planck, DESI DR2, and multiple Supernova compilations), finding that while the model is preferred over CDM and CDM by certain statistical metrics, current data can only robustly constrain the present-day equation of state () while leaving the transition parameters (, ) and early-time value () largely unconstrained.
This paper introduces differential-geometric methods to embed -dimensional locally conformally flat spaces, specifically FLRW metrics, into to derive explicit formulas relating intrinsic and ambient geometric objects and obtain simplified expressions for the photon propagator in four dimensions.