| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
I have constructed time-dependent solutions based on superstring theory and investigated its cosmological properties and its application to black holes. This study has revealed that the time-dependent solution makes it possible to track the collisions of multi black holes if they have the same electric charge, and has presented how the supersymmetry that existed in the early universe was gradually broken as the universe expanded. We have also shown that it is difficult to obtain inflationary and ekpyrotic cosmological models from superstring theory. Furthermore, we have found that the extreme black hole solution derived in this study does not give that extreme black holes can collapse into smaller extreme black holes, as suggested by the weak gravity conjecture.
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