⚛️ Category

gr-qc

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.

⚛️ general relativity

Evaluation of circular orbits and innermost stable circular orbits of neutral and charged particles around black holes

This paper mathematically and graphically evaluates the effective gravitational potentials, circular orbits, and Innermost Stable Circular Orbits (ISCOs) of neutral and charged particles around Schwarzschild, Kerr, Reissner-Nordström, and Kerr-Newman black holes, revealing how electromagnetic interactions and gravitational radiation influence orbital stability and energy loss.

Eahsaan Nazir Najar, Raja Nisar Ali, Yasmeena Mushtaq, Imtiyaz Ahmad Bhat2026-03-13
⚛️ general relativity

Cosmological gravity on all scales V: MCMC forecasts combining large scale structure and CMB lensing for binned phenomenological modified gravity

This paper presents a fast emulation framework for the matter power spectrum in a binned phenomenological modified gravity model, demonstrating that combining large-scale structure with CMB lensing data enables precise Bayesian constraints on the effective gravitational constant and gravitational slip across redshift bins.

Sankarshana Srinivasan, Shreya Prabhu, Kai Lehman, Ajiv Krishnan V., Jochen Weller2026-03-13
⚛️ general relativity

Topological field theory plus local Lorentz symmetry is gravity

This paper proposes a novel formulation of four-dimensional gravity derived from a topological field theory with global SL(2,C)\mathrm{SL}(2,\mathbb{C}) symmetry that becomes local, utilizing Weyl spinor-valued 1-forms to encode frame-field data and offering a framework particularly well-suited for discretization and quantization.

Maïté Dupuis, Florian Girelli, Oleksandra Hrytseniak, Wolfgang Wieland2026-03-13
⚛️ general relativity

Scale-Dependent Loop Corrections to the Inflationary Power Spectrum

This paper establishes a consistent renormalization framework within the Effective Field Theory of inflation that successfully cancels ultraviolet divergences and tadpoles for scale-dependent backgrounds with strong de Sitter symmetry breaking, demonstrating that the renormalized one-loop power spectrum vanishes at both large and small scales for resonant and sharp features while preserving perturbativity.

Matteo Braglia, Sebastián Céspedes, Lucas Pinol2026-03-13
⚛️ general relativity

Quiescent Big Bang formation in 2+12+1 dimensions

This paper proves that (2+1)(2+1)-dimensional solutions to the Einstein scalar-field Vlasov system, initially close to FLRW spacetimes on closed surfaces of arbitrary genus, exhibit stable Big Bang singularities with quiescent, velocity-term-dominated asymptotics and C2C^2-inextendibility, thereby establishing the Strong Cosmic Censorship conjecture for a corresponding class of polarized U(1)U(1)-symmetric vacuum solutions.

Liam Urban2026-03-12
⚛️ high-energy theory

Cosmological Dressing Rules

This paper introduces "cosmological dressing rules" that transform flat space Feynman diagrams into in-in correlators for conformally coupled and massless scalar theories in four-dimensional de Sitter space, thereby revealing a hidden simplicity linked to flat space scattering amplitudes while correctly reproducing infrared divergences predicted by the Schwinger-Keldysh formalism.

Chandramouli Chowdhury, Arthur Lipstein, Joe Marshall, Jiajie Mei, Ivo Sachs2026-03-12
⚛️ general relativity

Non-minimally coupled scalar field dark sector of the universe: in-depth (Einstein frame) case study

Motivated by recent DESI DR2 results suggesting evolving dark energy, this study analyzes spatially flat FLRW cosmological models with non-minimally coupled scalar fields in the Einstein frame, employing dynamical system methods to examine the evolution and stability of five specific scalar field models under various coupling parameters to understand energy transfer between the scalar sector and matter.

Marcin Postolak2026-03-12