University of Cambridge > > Cosmology Lunch > The Separate Universe Approach to Soft Limits

The Separate Universe Approach to Soft Limits

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

If you have a question about this talk, please contact Tobias Baldauf.

In this talk I’ll calculate soft limits of n-point inflationary correlation functions using separate universe techniques. Our approach naturally allows for multiple fields and leads to an elegant diagrammatic approach. We apply this to the bispectrum and trispectrum, giving explicit formulae for all possible single- and double-soft limits. When compared to previous work on the bispectrum we find a 20% theoretical correction to observable parameters relevant for future cosmological experiments. We also investigate consistency relations and present an infinite tower of inequalities between soft correlation functions which generalise the Suyama-Yamaguchi inequality.

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.


© 2006-2024, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity