PIRSA:12100042

Video URL

https://pirsa.org/12100042

Scalars with Higher Derivatives in Supergravity and Cosmology

Lehners, J. (2012). Scalars with Higher Derivatives in Supergravity and Cosmology. Perimeter Institute for Theoretical Physics. https://pirsa.org/12100042

Lehners, Jean-Luc. Scalars with Higher Derivatives in Supergravity and Cosmology. Perimeter Institute for Theoretical Physics, Oct. 09, 2012, https://pirsa.org/12100042 

          @misc{ scivideos_PIRSA:12100042,
            doi = {10.48660/12100042},
            url = {https://pirsa.org/12100042},
            author = {Lehners, Jean-Luc},
            keywords = {Cosmology},
            language = {en},
            title = {Scalars with Higher Derivatives in Supergravity and Cosmology},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2012},
            month = {oct},
            note = {PIRSA:12100042 see, \url{https://scivideos.org/index.php/pirsa/12100042}}
          }

Jean-Luc Lehners Self Employed

Talk numberPIRSA:12100042
DOI10.48660/12100042
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

There are many situations in cosmology that motivate the study of scalar fields with higher-derivative actions. The best-known such situations are probably k-inflation (with DBI-inflation being a special case) and models based on galileon theories, but even eternal inflation and cyclic universes provide good reasons to study such theories. After an extended discussion of the motivations, I will show how scalar field theories with higher derivatives can be constructed in (minimal, 4-dimensional) supergravity, and will discuss their properties, especially in regard to their cosmological applications.