2006/12/31 by Jie Ren, JIE REN, Hong-Guang Zhang +3
Physics and Astronomy · #Advanced Mathematical Theories and Applications #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph
paper · pdf · doi:10.1142/s0218271809015126
published as Int.J.Mod.Phys.D18:1343-1353,2009 · 6 pages, 2 figures; v4: accepted by IJMPD
arxiv created 2009/03/11 · openalex publication_date 2009/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The vacuum inflation with a boundary condition specified at a short distance scale in a generally primeval nonflat universe, and implications of the correspondingly modified primordial power spectrum via the WMAP data are investigated. We obtain a general form of the modified primordial power spectrum including the effects of both the possibly new physics scale and the spatial curvature. The modulation of the primordial power spectrum due to new physics is of the order H/Λ, where H is the Hubble parameter during inflation and Λ is the new physics scale which is key to inflation, while the modulation from the curvature effect is of the order K/k 2 , where K is the spatial curvature before inflation and k is the comoving wave number. We also find that a closed universe before inflation is favored by WMAP five-year data.