research on cosmological nonlinear and non-perturbative gravitational phenomena

2014 Fiscal Year Final Research Report

• Project/Area Number: 21244033
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyoto University
• Principal Investigator: SASAKI Misao 京都大学, 基礎物理学研究所, 教授 (70162386)
• Co-Investigator(Kenkyū-buntansha): TANAKA Takahiro 京都大学, 基理学研究科, 教授 (40281117)
• Co-Investigator(Renkei-kenkyūsha): SHIROMIZU Tetsuya 名古屋大学, 理学研究科, 教授 (10282716) ; SODA Jiro 神戸大学, 理学研究科, 教授 (00222076) ; MUKOHYAMA Shinji 京都大学, 基礎物理学研究所, 教授 (40396809) ; MATSUBARA Takahiko 名古屋大学, 理学研究科, 准教授 (00282715) ; TAKAHASHI Fuminobu 東北大学, 理学研究科, 准教授 (60503878) ; CHIBA Takeshi 日本大学, 文理学部, 准教授 (40324602) ; TSUJIKAWA Shinji 東京理科大学, 准教授 (30318802) ; ISHIHARA Hideki 大阪市立大学, 理学研究科, 教授 (80183739) ; YAMAMOTO Kazuhiro 広島大学, 理学研究科, 准教授 (50284154) ; YAMAGUCHI Masahide 東京工業大学, 理学研究科, 教授 (80383511)
• Project Period (FY): 2009-04-01 – 2015-03-31
• Keywords: インフレーション宇宙 / 宇宙論的非線形摂動 / 修正重力理論 / 宇宙の大規模構造 / 宇宙背景輻射 / 暗黒エネルギー

Outline of Final Research Achievements

It is believed that the universe has undergone a stage of accelerated expansion, an inflationary stage, right after the birth, and all the fluctuations that are responsible for the structure of the universe today were generated during this stage. One of the most important issues in cosmology is to understand how these fluctuations have evolved to the large scale structure of the universe such as galaxies through nonlinear and non-perturbative gravitational phenomena. In this project, we have systematically investigated various types of fluctuations, from microscopic quantum fluctuations to macroscopic fluctuations of spacetime, and obtained many world top-class results. These results form an important basis for the future direction of research in cosmology.

Free Research Field

相対論・宇宙論