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EFT for de Sitter Space

Daniel Green, University of California San Diego
Tuesday, May 23, 2023 - 3:00pm
PAT C-421

I will discuss recent progress in understanding perturbative quantum field theory in de Sitter and inflationary backgrounds using Soft de Sitter Effective Field. I will explain why loop corrections and IR divergences have previously presented serious challenges and show how they are resolved in the EFT description. I will apply these lessons to scalar field theory in de Sitter and metric fluctuations during inflation.

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