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 challenges the classic Gondolo-Silk paradigm by demonstrating that mass segregation in realistic nuclear star clusters and irreversible ejection of dark matter particles by extreme mass-ratio inspirals (EMRIs) rapidly deplete collisionless dark matter spikes, potentially rendering their gravitational-wave signatures undetectable by LISA for most intermediate-mass black holes.
This paper details the identification, characterization, and mitigation of low-frequency infrastructure noise from heating, ventilation, and air conditioning systems at the Virgo gravitational wave observatory to enhance its sensitivity for the upcoming O4 observing run.
This paper presents a numerical study of energy and angular momentum fluxes for a test particle on generic orbits around a Kerr black hole, revealing complex flux behaviors in eccentric and hyperbolic trajectories and proposing a new factorized, resummed analytical model that significantly improves the prediction of superradiant regimes and flux accuracy in the strong-field limit compared to existing post-Newtonian expressions.
By analyzing 85 binary black hole mergers from the O4a observing run, this study finds no statistically significant evidence for orbital eccentricity, thereby ruling out single-single gravitational wave captures in nuclear star clusters as the dominant formation channel for all observed LIGO-Virgo-KAGRA events.
Motivated by the linguistic coincidence that both bird calls and gravitational waves are described as "chirps," this satirical paper humorously proposes that Northern cardinal vocalizations can be modeled as gravitational waves from a precessing black hole binary, suggesting a whimsical link between ornithology and cosmology.
This paper demonstrates that in asymptotic safety, quantum gravity effects can paradoxically increase the photon escape probability and maximum observable blueshift from the innermost stable circular orbit of rapidly rotating black holes, despite reducing the orbit's radius, thereby revealing how quantum corrections can dominate over classical background effects.
This paper investigates the phenomenological viability of Oppenheim's semiclassical gravity model by analytically deriving the strain spectrum of quantum geodesic deviation, demonstrating that current gravitational-wave experiments can test the original model, and comparing its predictions with those of two modified semiclassical models and perturbative quantum gravity.
This paper investigates the minisuperspace quantum cosmology of Cosmological Einsteinian Cubic Gravity by deriving its Hamiltonian formulation via canonical transformations, performing Wheeler-DeWitt quantization to obtain exact and WKB-type wave functions for various spatial geometries, and analyzing the resulting strong correlations between coordinates and momenta in the presence of an inflationary scalar field.
This paper evaluates the utility of the coprecessing frame for modeling gravitational waveforms from eccentric, precessing compact binaries using numerical relativity simulations, finding that while it facilitates surrogate modeling by reducing amplitude and phase modulations, it fails to fully separate precession effects from eccentricity, resulting in waveform mismatches that remain too high for precise characterization.
This paper investigates energy extraction from rotating black holes in Horndeski gravity via the Magnetic Penrose Process, revealing that the theory's hair parameter generally reduces the ergosphere and negative energy regions, thereby suppressing extraction efficiency in most scenarios but potentially enabling high positive efficiency for specific large magnetic field and decay radius conditions where standard Kerr black holes fail.