A Possible Lorentz Violation and Its Impact on Cosmology
| Project/Area Number |
18540262
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyoto University |
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Principal Investigator |
SODA Jiro Kyoto University, 大学院・理学研究科, 准教授 (00222076)
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| Project Period (FY) |
2006 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥3,960,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥660,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | 宇宙論 / ローレンツ不変性 / インフレーション / 非等方 / 円偏光 / 宇宙論的摂動理論 / 統計的非等方性 / 宇宙背景輻射 / ベクトル / 宇宙無毛仮説 / 原始重力波 / ガウス・ボンネ / 不安定性 / 超弦理論 / チャーン・サイモン / ローレンツ不変性の破れ / ベクトル・テンソル重力理論 / 揺らぎ |
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| Research Abstract |
Due to developments of observations, it becomes important to check the fundamental principle such as Lorentz invariance. Moreover, precision cosmology urged us to study theoretical fine structure. However small it is, it is worth exploring in detail. Based on this motivation, we have studied the impact of Lorentz violation on cosmology. We found an anisotropic inflationary scenario where Lorentz invariance is spontaneously broken. We also formulated cosmological perturbation theory in this background and succeeded in making predictions for various observables relevant to future observations of cosmic microwave background radiation.
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Report
(6 results)
Research Products
(33 results)
