2693 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 establishes a unified framework linking generalised entropies, cutoff mechanisms, and extended uncertainty principles by deriving a novel MOND-based EUP from a recently proposed MOND entropy, demonstrating its consistency with various entropy models and its ability to generate modified Friedmann equations that encompass higher-order EUP results as limiting cases.
This paper presents the first closed analytic construction of an infinite family of discretely self-similar solutions for the Einstein-massless-Klein-Gordon system using a large-D expansion, characterizing their structure and comparing them with finite-D numerical critical solutions to identify both universal and large-D-specific features.
This paper proposes a model of "enhanced " symmetry where two right-handed neutrinos possess arbitrarily large charges, keeping them massless until gravity-induced symmetry breaking generates sub-eV neutrino masses, while the resulting light gauge boson offers distinct constraints and detection signatures through neutrino decays and scattering processes.
This paper presents the first comprehensive numerical study demonstrating that entanglement entropy in the Sauter-Schwinger effect transitions from area-law to volume-law scaling under strong-field conditions, revealing a fundamental shift in quantum correlations driven by nonperturbative pair production.
This paper demonstrates that while LISA cannot detect higher harmonics from most Galactic double white dwarfs, future decihertz-band observatories like DECIGO and BBO will be able to detect these signals for a significant fraction of inspiral binaries, thereby enabling statistical constraints on mass ratios and establishing a complementary strategy for space-based gravitational-wave astronomy.
This paper demonstrates that suitable quartic couplings in the Pati-Salam model can prevent symmetry restoration at high temperatures, thereby avoiding the thermal production of 't Hooft-Polyakov monopoles and removing constraints on the symmetry breaking scale.
This study demonstrates that hierarchical Bayesian inference applied to simulated LISA extreme mass-ratio inspiral (EMRI) catalogues can effectively constrain massive black hole population parameters and disentangle mixed subpopulations with as few as 20 detections, even when the underlying astrophysical models are misspecified.
This paper introduces "norns," a new relativistic simulation code to study environment-dependent clustering in phantom-crossing dark energy models, revealing that non-minimally coupled scalar fields driving late-time phase transitions can generate cosmic strings that suppress structure growth in voids while enhancing it in overdense regions, leaving distinctive signatures in the matter distribution detectable in low-redshift data.
The paper introduces IMRPhenomTEHM, a new time-domain phenomenological waveform model for aligned-spin binary black holes in elliptical orbits that integrates eccentric post-Newtonian dynamics up to 3PN, achieves high accuracy against numerical relativity simulations without direct calibration, and is validated for use in upcoming gravitational-wave observing runs.
This paper reanalyzes 17 gravitational-wave events using a new eccentric waveform model (IMRPhenomTEHM) to demonstrate that two specific events show evidence for orbital eccentricity, while others exhibit potential eccentric features, thereby highlighting the necessity of incorporating eccentric models to avoid biases in parameter estimation and better understand binary black hole formation channels.