2593 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 demonstrates the integrability of a generalized multivariable Painlevé-II equation with symmetry breaking, utilizing a Lax pair and the exact solution of the Demkov-Osherov model to derive connection formulas for asymptotic solutions and apply them to the precise scaling of excitations in unstable vacuum decay during second-order phase transitions.
This paper calculates the cosmological rates of primordial black holes tunneling into white holes and concludes that while such events could theoretically produce fast radio bursts, current observational constraints and the requirement for highly fine-tuned parameters strongly disfavor them as the dominant origin of the FRB population.
This paper proposes using magnetically levitated superconductors to detect ultra-light dark gravitons in the dHz to kHz range, finding that while their sensitivity to matter couplings is limited compared to existing experiments, they could serve as highly sensitive laboratory probes for dark-graviton couplings to electromagnetism.
This paper derives exact expressions for peeling-violating Weyl tensor components in classical gravitational scattering by utilizing matching conditions at spatial and timelike infinity alongside a "celestial diamond" framework, while also highlighting that perturbative quantum gravity exhibits even stronger peeling violations.
This paper investigates virtual absorption modes in Schwarzschild-de Sitter spacetime under semi-open boundary conditions, demonstrating through numerical analysis that these modes correspond to total transmission states which, when excited, lead to coherent perfect absorption and serve as spectral signatures for exotic compact objects.
This paper derives updated constraints on the amplitude of the primordial curvature power spectrum from primordial black hole abundances by systematically comparing Press-Schechter and peak theory formalisms, revealing that non-spherical collapse effects and the choice of statistical method significantly influence the inferred limits, particularly for broad power spectra.
This paper investigates the detection of low-frequency stochastic gravitational-wave backgrounds using Gaia DR3 quasar proper motions, comparing Vector Spherical Harmonics and Hellings-Downs curve methods to establish a strain sensitivity limit of approximately and forecast improvements for future data releases.
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.