3179 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 argues that by seriously analyzing the structural similarities between black hole paradoxes and Extended Wigner's Friend scenarios, the former supports interpretations of the latter that rely on intrinsic relationality and retrocausality rather than emergent relationality.
This paper introduces a systematic prolongation procedure for Killing two-tensors, particularly in locally symmetric spaces, and applies it to clarify the natural quadratic mapping from Killing fields to Killing two-tensors on irreducible locally symmetric spaces of compact type.
This paper introduces the \texttt{gwNRHME} framework, which leverages universal eccentric modulation functions to extend quasi-circular numerical relativity surrogates into multi-modal, non-spinning eccentric waveform models (specifically \model{}) that achieve high accuracy against numerical relativity simulations while also providing analytical tools for eccentricity evolution.
This paper demonstrates that in Schwarzschild spacetime, static structures with internal stress can generate a minute buoyancy-like force due to the coupling between stress and curvature gradients, revealing a new aspect of extended-body dynamics despite the effect being too small to cause actual ascent.
This paper investigates gravitational eikonal scattering in nonlocal -dimensional theories to derive effective geometries that, when nonlinearly completed, yield singularity-free, asymptotically flat black hole solutions featuring a de Sitter core.
This paper computes the two-loop Yukawa scalar self-energy and the resulting loop-corrected coincident two-point correlation function in inflationary de Sitter spacetime, demonstrating that the leading secular growth scales as and yields a bounded, monotonically decreasing expectation value that implies an increasing dynamically generated scalar mass with stronger coupling.
This paper proposes and analyzes the CDM model, which introduces a positive barotropic fluid to modify the early expansion rate, demonstrating that this alternative to Early Dark Energy can effectively alleviate the tension while remaining consistent with current cosmological observations.
This paper demonstrates that spontaneous Lorentz symmetry breaking in a rotating black hole creates macroscopic optical nonreciprocity, causing the black hole's shadow to morph into a distinct teardrop shape when the source and observer are swapped, effectively turning the black hole into a cosmic-scale optical diode.
This paper investigates slowly rotating traversable wormholes supported by three holographic dark energy models (Rényi, mixed, and Moradpour) to analyze how their distinct energy density profiles and redshift functions influence photon dynamics, null geodesics, and the resulting shadow morphology, revealing that Rényi-supported wormholes produce smaller, asymmetric shadows while mixed and Moradpour models yield larger, nearly circular silhouettes.
This paper demonstrates that even when classical and quantum dynamics are aligned at a specific moment during inflation, their correlation functions diverge exponentially by the end of inflation due to interactions, a difference illustrated through the bispectrum and tensor power spectrum that also clarifies the absence of poles in the scalar bispectrum from finite-time classical evolution.