University of Cambridge > Talks.cam > Cosmology Lunch > Soft de Sitter Effective Theory

Soft de Sitter Effective Theory

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact David Stefanyszyn.

Understanding the quantum evolution of a de Sitter universe on superhorizon scales is notoriously difficult. To address this challenge, we introduce the Soft de Sitter Effective Theory (SdSET), which holds for superhorizon modes whose (comoving) momentum is far below the UV cutoff, the (comoving) horizon. SdSET makes power counting manifest while preserving the low energy symmetries, simplifying many aspects of perturbation theory outside the horizon. As an example, we will give a simple derivations of the all orders conservation of the adiabatic modes and gravitational waves.

This talk is part of the Cosmology Lunch series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2020 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity