3784 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 a systematic survey of tidal resonances in extreme-mass-ratio inspirals (EMRIs) driven by nearby compact objects, providing resonance contours, durations, and jump amplitudes to establish a practical ranking of resonances most relevant for LISA waveform modeling.
This paper reviews the discoveries and scientific insights from the fourth LIGO-Virgo-KAGRA observing run, highlighting a catalogue of approximately 100 new gravitational-wave detections that enable population-level analyses to constrain astrophysical distributions, test general relativity, and measure the Universe's expansion rate.
Using numerical-relativity injections modeled after the GW231123 event, the study demonstrates that while incorporating lensing degrees of freedom can reduce waveform discrepancies and yield non-negligible lensing support, this effect is not systematic and no cases were found where lensing universally favored the data while simultaneously resolving waveform modeling systematics.
This paper utilizes unified field equations to analyze the eight local couplings of gravitational waves within the E(2) little group framework, demonstrating how time-varying helicity-±1 currents generate gravito-magnetic waves that enter the detector mixture alongside standard polarizations, thereby enabling the isolation of distinct modes for rigorous model testing.
This paper proposes a manifestly conformally invariant off-shell definition of the Galilean Weyl tensor and its electric and magnetic parts, arguing that the vanishing of the magnetic part via specific observers should be a necessary condition for a theory to be termed "Newtonian," while also demonstrating that a unique Galilean boost-invariant connection can be constructed without a mass gauge field.
This paper demonstrates that while gravitational retarded potentials allow for the creation of entanglement across a black hole event horizon, extracting this state radially induces decoherence via soft-graviton bremsstrahlung, whereas tangential harvesting via quantum erasure reveals a geometric duality where spacetime irreversibly degrades radial entanglement but permits transverse teleportation to infinity.
This paper utilizes cosmological N-body simulations to quantify how non-standard cosmologies, such as gravity and massive neutrinos, alter dark matter halo profiles compared to CDM, demonstrating that detecting these deviations with future Euclid weak-lensing surveys requires large halo stacks and precise modeling to avoid systematic biases.
This paper establishes a comprehensive coincident gauge framework for cosmology with arbitrary spatial curvature by constructing coordinates from cosmological Killing vectors, thereby correcting previous literature flaws, unifying flat and curved solutions with metric teleparallel models, and clarifying the roles of diffeomorphism and local Lorentz invariance.
This paper investigates the classical Hamiltonian dynamics of Loop Quantum Gravity on a simplified "candy graph" structure, demonstrating that the evolution of bulk link areas reduces to a pair of non-linear differential equations with analytical solutions exhibiting both oscillatory and divergent behaviors.
This paper computes the static tidal response of unspinning charged black holes by generalizing Love numbers to Love matrices, revealing that quantum vacuum fluctuations induce a running tidal response governed by the gauge coupling beta function, which saturates in the strong-field regime and offers a potential gravitational-wave probe for nearly-extremal magnetic black holes in dark sectors.