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Infinite derivative gravity as a strong UV completion candidate and its cosmological implications
11/22
2023
Seminar
- Title Infinite derivative gravity as a strong UV completion candidate and its cosmological implications
- Speaker Alexey Koshelev (ShanghaiTech University)
- Date 10:00 Nov. 22, 2023
- Venue South Building 6620
Abstract
In my talk I will explain how higher and infinite derivatives naturally arise in a consideration of quantum properties of general gravity theories. I will construct the most general propagator around Minkowski and (anti)-de Sitter backgrounds proving that an infinite tower of derivatives is inevitable in order to exorcise ghosts. Then I will build on this explaining cosmological implications: modification of a tensor power spectrum, large non-Gaussianities, ideas towards observable primordial gravitational waves and related questions.
Invitor:
Gang Yang