2005/02/28 by Yun-Song Piao · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.1103/physrevd.71.087301
published as Phys.Rev. D71 (2005) 087301 · 10 pages, 3 eps figures, accepted for publication in PRD, v2 revised with published version
openalex publication_date 2005/04/08 · arxiv created 2005/04/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Universe might experience many cycles with different vacua. The slow-roll inflation may be preceded by kinetic-dominated contraction occurring in ``adjacent'' vacua during some cycles. In this report we briefly show this phenomenon may lead to a cutoff of primordial power spectrum, which is mildly preferred by WMAP data. Thus in some sense the cosmic microwave background at large angular scale might encode the information of other vacua.