3803 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 proposes and analytically solves a simple one-dimensional Euclidean quantum gravity model using U(1) Haar measure, revealing that while open curves yield an infinite universe in the continuum limit, closed curves with a positive cosmological constant result in a finite-size universe.
This paper investigates a single-field mutated hilltop inflation model by combining Planck, BICEP/Keck, and ACT observational data with reheating and gravitational wave constraints to significantly tighten the allowed ranges for the inflationary duration and the model parameter .
This paper demonstrates that within Loop Quantum Cosmology, inverse volume corrections enable low-scale spontaneously broken supersymmetric and exponential inflationary potentials to align with recent Atacama Cosmology Telescope data, placing their predictions within the 68% confidence level in the plane where standard inflation models fail.
This paper establishes a systematic, all-orders perturbative map that explicitly reorganizes diagrammatic expansions of the Wavefunction of the Universe into Schwinger-Keldysh in-in correlators, thereby providing a concrete bridge between these two central frameworks for analyzing primordial cosmological observables.
This paper reports the first cryogenic mechanical loss measurements of substrate-transferred GaAs/AlGaAs crystalline coatings, demonstrating that after accounting for support friction and Akhiezer loss, the results align well with thermal noise observations in high-precision experiments.
This paper argues that while recent DESI results favor a dynamical dark energy model over CDM within the standard fluid framework (claim D2), they do not constitute evidence for a physical dynamical dark energy component (claim D3) because the same observational data can be equally explained by modified gravity theories, revealing a fundamental underdetermination between matter-sector and gravitational-sector interpretations.
This paper investigates how gravitational-wave signals from binary mergers can be used to test f(R) modified gravity theories and evaluates the potential of next-generation detectors to constrain these extensions of General Relativity.
This paper resolves the paradox of imaginary momentum in quantum tunneling by introducing a complex-time parametrization that reinterprets evanescent traversal as a causal, light-speed-bounded process, a theory validated through its analogy to transmission delay in non-Hermitian microwave scattering experiments.
This paper proves that black hole isospectrality between parity sectors arises in chiral-aligned theories when perturbations are reconstructed from complex master variables satisfying a closed linear system, a result explicitly demonstrated for subextremal Kerr–de Sitter black holes.
This paper argues that the singularity inside a black hole is a two-dimensional surface rather than a point, a conclusion supported by the causal separation of infalling observers and the mass inflation instability at the inner horizon of rotating black holes, with significant implications for the unitary evolution of quantum gravity states.