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 investigates static spherically symmetric vacuum solutions in f(R) gravity within the Einstein frame, revealing that the scalaron field exhibits universal behavior across different astrophysical masses and scalarization region sizes, while also deriving asymptotic metric parameters near central naked singularities for three distinct scalaron potentials.
This paper performs a comprehensive thermodynamic analysis of three sign-switching dark energy models using the Generalised Second Law as a viability criterion, finding that while sign-switching cosmological constant models remain consistent, the graduated dark energy model is ruled out due to thermodynamic inconsistencies arising from divergences in its equation-of-state parameters.
This study introduces a general three-parameter dark energy equation-of-state parametrization that encompasses existing models like CPL, and using a comprehensive suite of latest cosmological data, finds that while the data mildly prefers this new model over CPL, both are statistically indistinguishable and support a present-day quintessence regime with no significant evidence for dynamical evolution.
This paper introduces a novel characterization of the holographic entropy cone using Markov states and a majorization test, providing strong evidence that the inequalities defining the static Ryu-Takayanagi cone also hold for the covariant Hubeny-Rangamani-Takayanagi cone, with the surprising finding that only these specific inequalities satisfy the test.
This paper presents a suite of cosmological simulations incorporating primordial non-Gaussianities from collider physics to characterize their nonlinear signatures in late-time observables and forecasts competitive constraints on these signals using future Vera C. Rubin Observatory weak-lensing data.
This paper demonstrates that weak lensing analysis of future LSST data can provide competitive and complementary constraints on primordial non-Gaussianity models, particularly those with features on small scales, by resolving their signatures in the deeply nonlinear late-time density field through a suite of over thirty templates and new simulations of resonant signatures.
This paper investigates New Massive Gravity augmented with Chern-Simons, cubic, and quartic terms under CSS boundary conditions, demonstrating that BTZ black hole entropy can be derived from a Warped-CFT degeneracy and that linearized energy excitations remain non-negative at two specific chiral points.
This study investigates how ideal fermionic dark matter with masses between 0.2 and 1 GeV affects neutron star structures and tidal properties, revealing that current astrophysical constraints from NICER, 2-solar-mass observations, and LIGO/Virgo data severely limit the permissible dark matter mass fractions and exclude specific parameter ranges to ensure consistency with observed neutron star characteristics.
This paper derives closed-form, second post-Newtonian phasing formulae for eccentric compact binary inspirals with precessing spins by exploiting timescale separation and precession averaging, thereby enabling efficient and accurate gravitational waveform modeling without the need for numerical integration.
This paper extends strong-deflection-limit analysis methods to investigate gravitational lensing by rays inside and outside marginally unstable photon spheres in general static, spherically symmetric, asymptotically-flat spacetimes, applying the framework to Reissner-Nordström and Hayward models to resolve previous discrepancies in power-divergent deflection angle calculations.