Construction of Models reproducing History of Universe based on Modified Gravity Theories
| Project/Area Number |
23540296
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 | Nagoya University |
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Principal Investigator |
Nojiri Shin'ichi 名古屋大学, 理学(系)研究科(研究院), 教授 (00432229)
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| Project Period (FY) |
2011-04-28 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 暗黒エネルギー / 修正重力理論 / インフレーション / 修正重力 / ユニモジュラー重力理論 / 位相的場の理論 / ドメインウォール / F(R) 重力 / 2階対称テンソル場の理論 / シンメトロン / 質量を持つ重力 / 臨界重力理論 / リトルリップ / ゆらぎの成長 |
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| Outline of Final Research Achievements |
I have investigated many kinds of modified gravity theories, that is, F(R) gravity, Galileon models, massive gravity, bi-gravity, domain wall model, Born-Infeld gravity, mimetic model, unimodular gravity, etc.I have extended them so that the models could describe the evolution of the universe, and found constraints on the models. Then I found that most of the model can reproduce the evolution of the universe if we give some constraints on the parameters of the models, We should note, however, that there is no model which could be completely natural. Furthermore I have also found that it could be difficult to satisfy the consistencies as a quantum theory.
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Report
(6 results)
Research Products
(76 results)
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[Presentation] New theory of massive spin-two field2014
Author(s)
S. Nojiri
Organizer
2nd International Workshop on Particle Physics and Cosmology after Higgs and Planck
Place of Presentation
National Tsing Hua University, Hsinchu, Taiwan
Year and Date
2014-10-08 – 2014-10-11
Related Report
Invited
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[Presentation] Some extension of bigravity2014
Author(s)
S. Nojiri
Organizer
Quantum Field Theory and Gravity (QFTG’14)
Place of Presentation
Tomsk State Pedagogical University, Tomsk, Russia
Year and Date
2014-07-28 – 2014-08-03
Related Report
Invited
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