2007/04/30 by Seong Chan Park
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Compactification (mathematics) #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Extra dimensions #Flatness (cosmology) #Galaxies: Formation, Evolution, Phenomena #Gravitation #Gravitational wave #Inflation (cosmology) #Inflaton #Mathematical physics #Orbifold #Physics #Quantum #Quantum gravity #Quantum mechanics #Quantum nonlocality #Slow roll #Spectral index #Spectral line #Theoretical physics #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2007/11/001
published as JCAP0711:001,2007 · 12 pages, 6 figures, JCAP accepted version
arxiv created 2007/10/17 · openalex publication_date 2007/11/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider a scenario of cosmological inflation coming from a grand unified theory in higher-dimensional orbifold. Flatness of the potential is automatically guaranteed in this orbifold set-up thanks to the nonlocality of the Wilson line on higher dimensions and the local quantum gravitational corrections are exponentially suppressed. The spectral index of scalar perturbation ( ) and a significant production of gravitational waves are predicted ( ) in the perturbative regime of gauge interaction (1/ g 4 = (5–20) × 2π RM Pl ) where the size of compactification is constrained ( –45) by the measurement of the scalar power spectrum ( ).