2023 Fiscal Year Final Research Report
Testing Theories of Gravity in Various Regimes in Cosmology with Gravitational Wave
| Project/Area Number |
22K20367
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0203:Particle-, nuclear-, astro-physics, and related fields
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2022-08-31 – 2024-03-31
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| Keywords | Inflation / Black hole / Modified gravity / Dark energy / Magnetogenesis |
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| Outline of Final Research Achievements |
1. I successfully constructed a single effective description of black hole perturbations with timelike scalar profile. This allows us to extract an interesting phenomena due to modifications of gravity in the vicinity of black hole. This led to several publications.
2. I successfully computed the distribution function of a promordial field during inflation. This is important for studying the formation of primordial blakc holes.
3. I successfully constructed a model, describing the resonant production of magnetic field in the early universe. This explains the observed value of magnetic field on the intergalactic scales.
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| Free Research Field |
Cosmology and Gravity
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| Academic Significance and Societal Importance of the Research Achievements |
1. The study of effective field theory provides a universal way to test theories of gravity in various scales of our Universe.
2. The study of the wavefunction of the Universe leads us to understand the non-perturbative feature that lies beyond our standard computation.
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