2018/08/01 by Gabriel Moreau, Julien Serreau · 44 citations
Physics and Astronomy · #Anti-de Sitter space #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Curvature #De Sitter space #De Sitter universe #Functional renormalization group #Geometry #Mathematical physics #Physics #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum electrodynamics #Quantum field theory in curved spacetime #Quantum fluctuation #Quantum gravity #Quantum mechanics #Renormalization #Renormalization group #Scalar (mathematics) #Scalar field #Spacetime #Universe #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevlett.122.011302
published in Physical Review Letters 122(1), 011302 (American Physical Society) · 4 pages, 1 figure
arxiv created 2018/08/01 · openalex publication_date 2019/01/10 · arxiv updated 2019/01/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the backreaction of superhorizon fluctuations of a light quantum scalar field on a classical de Sitter geometry by means of the Wilsonian renormalization group. This allows us to treat the gravitationally amplified fluctuations in a nonperturbative manner and to analytically follow the induced renormalization flow of the spacetime curvature as long wavelength modes are progressively integrated out. Unbounded loop corrections in the deep infrared are eventually screened by nonperturbative effects which stabilize the geometry.