2010/10/31 by Thomas Buchert, N. Obadia, Nathaniel Obadia
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Curvature #Einstein #False vacuum #Galaxies: Formation, Evolution, Phenomena #Geometry #Homogeneous #Inflation (cosmology) #Inflaton #Isotropy #Mathematical physics #Physics #Quantum mechanics #Scalar (mathematics) #Scalar curvature #Scalar field #Statistical physics #Theoretical physics #Universe #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1088/0264-9381/28/16/162002
published as Class.Quant.Grav.28:162002,2011 · 9 pages, 2 figures, to appear in Class. Quant. Grav. as Fast Track Communication
arxiv created 2011/06/22 · openalex publication_date 2011/07/21 · arxiv updated 2011/07/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract\nWe consider spatially averaged inhomogeneous universe models and argue that, already in the absence of sources, an effective scalar field arises through foliating and spatially averaging inhomogeneous geometrical curvature invariants of the Einstein vacuum. This scalar field (the 'morphon ') acts as an inflaton, if we prescribe a potential of some generic form. We show that, for any initially negative average spatial curvature, the morphon is driven through an inflationary phase and leads ? on average ? to a spatially flat, homogeneous and isotropic universe model, providing initial conditions for pre?heating and, by the same mechanism, a possibly natural self?exit.