| 研究課題/領域番号 |
20F20320
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| 研究機関 | 東京工業大学 |
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研究代表者 |
山口 昌英 東京工業大学, 理学院, 教授 (80383511)
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| 研究分担者 |
KORUMILLI SRAVAN KUMAR 東京工業大学, 理学院, 外国人特別研究員
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| 研究期間 (年度) |
2020-11-13 – 2023-03-31
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| キーワード | non-local theory |
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| 研究実績の概要 |
During this period he had worked on two important projects. One is on formulating a non-local theory of gravity that is ghost-free both in Minkowski and quasi deSitter spacetimes. This required a significant extension of his previous research on this subject. The second project is on finding anisotropic bouncing solutions in non-local gravity. This project was important in the context of resolving cosmological singularities with nonlocal theories and also in making a geodesic completion for inflationary space-time. Also during this period, he had started to work on non-local scalar field theories and their cosmological implications.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
He has already obtained new good results.
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| 今後の研究の推進方策 |
We will focus on theoretical aspects of non-local theories. The discovery of trace anomaly has posed a big challenge to any approach towards quantum gravity. It must be removed for a consistent quantum gravity theory though it motivated one to propose the first inflation model. We will study if introducing infinite derivative non-locality in the matter Lagrangians and generalising matter coupling to gravity can resolve this problem and give finite quantum corrections to gravity. This is an important investigation for non-local gravitational theories in bringing them a step closer to quantum gravity.
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