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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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | Quasinormal Modes / Effective Field Theory / Vector-tensor Gravity / Wavecfunction / Resonant non-Gaussianity / Effective field theory / Regge-Wheeler equation / Magnetogenesis / Modified gravity / Gravitational wave / Dark energy / Inflation / Black hole |
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| Outline of Research at the Start |
The research outline is to study modified theories of gravity in various regimes in cosmology (dark energy, black hole and inflation) and to use the observations relevant to those regimes to constrain those modified gravity theories.
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| Outline of Annual Research Achievements |
1. I have published a paper on Quasinormal modes from EFT of black hole perturbations with timelike scalar profile in JCAP with Prof.Shinji Mukohyama (YITP), Dr.Kazufumi Takahashi (YITP) and Dr.Keitaro Tomikawa (Rikkyo). This is the first phenomenological application of the effective field theory of black hole perturbations I have constructed with Prof.Shinji Mukohyama. In fact, this allows us to test theories of gravity in the strong gravity regime.
2. I have published a paper on Effective field theory of black hole perturbations in vector-tensor gravity in JCAP with Dr.Katsuki Aoki (YITP), Dr.Mohammad Ali Gorji (ICC, Barcelona), Prof.Shinji Mukohyama and Dr.Kazufumi Takahashi. This EFT can be used to describe dynamics of perturbations including gravitational waves in an arbitrary background.
3. I have published a paper on Non-perturbative wavefunction of the universe in inflation with (resonant) features in JHEP with Prof.Paolo Creminelli (ICTP, Trieste), Prof.Sebastien Renaux-Petel (IAP, Paris) and Dr.Giovanni Tambalo (Max Planck, Potsdam). This work shows a non-perturbative feature of the wavefunction of the universe in the large field limit, which cannot be captured by any order in perturbation theory.
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Report
(2 results)
Research Products
(24 results)
