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KIAS HEP seminars

Open EFTs for Cosmology

by Dr Perseas Christodoulidis (Ewha Women's University)

→ Asia/Seoul
Room 1423 (KIAS)

Room 1423 (KIAS)
Description

Title: Open EFTs for Cosmology

Speaker: Perseas Christodoulidis

Abstract: 

I will discuss how to construct a gravitational open extension of the effective field theory of inflation in the Schwinger-Keldysh framework. While physical symmetries allow many open operators in the Schwinger-Keldysh action, most of them overconstrain the equations of motion, yielding inconsistent dynamics. By identifying the minimal open operators compatible with propagating scalar and tensor modes, I will construct a local gravitational  Schwinger-Keldysh  action, recovering dissipative models of inflation such as warm inflation. I will also briefly discuss how stochastic inflation fits into this program.

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