2011 Fiscal Year Final Research Report
Fundamental problems in a generation of a primordial perturbation
| Project/Area Number |
22840043
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Ochanomizu University |
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Principal Investigator |
URAKAWA Yuko お茶の水女子大学, 理学部, 学部教育研究協力員 (80580555)
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| Project Period (FY) |
2010 – 2011
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| Keywords | インフレーション / 宇宙背景輻射 / 非線形摂動 / ゲージ不変摂動論 / 赤外発散 / 非ガウス性 |
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| Research Abstract |
Inflation has become the leading scenario of the early universe by explaining the large scale temperature fluctuation of the cosmic microwave background. In spite of the great success of the inflationary scenario, there is a huge ambiguity in the model of inflation. To obtain more detailed information regarding the model of inflation, it is crucial to observe the non-linear primordial fluctuations. To calculate an observable large scale fluctuation in each model of inflation, it is necessary to take into account the finiteness of the observable region. We establish a way to calculate a non-linear observable fluctuation based the gauge-invariant perturbation theory in a local universe.
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