3949 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 the first exact analytical solution to the DeWitt-Brehme-Hobbs equation for a charged mass interacting with copropagating electromagnetic and gravitational plane waves, demonstrating how gravitational waves can qualitatively alter electromagnetic radiation-reaction effects.
Dedicated to the memory of Dharam Ahluwalia, this paper provides a concise overview of the key characteristics of Carroll spinors.
This study demonstrates that stochastic kicks in ultra-slow-roll inflation models create spiky compaction profiles that can enhance primordial black hole abundance by up to 36 orders of magnitude and significantly shift their mass function, though convergence issues necessitate further investigation into collapse criteria for such profiles.
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 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 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 investigates cosmic void evolution within Horndeski theory using the effective field theory of dark energy, revealing that modifications to the critical density contrast are suppressed by compensating effects while the resulting void abundance exhibits scale-dependent changes driven by both the linear matter power spectrum and the critical density contrast.
This study revisits the prospects of detecting solar -modes with space-based gravitational-wave detectors like LISA and TianQin, finding that updated solar models and sensitivity curves predict negligible signal differences between metallicity variations, suggesting that solar metallicity uncertainties have a minimal impact on detectability.