PIRSA:12100042 Scientific Series Cosmology

DOI10.48660/12100042

Series: Cosmology and Gravitation

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

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

@misc{ pirsa_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},
  year = {2012},
  month = {oct},
  note = {PIRSA:12100042 see, \url{https://pirsa.org}}
}

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.

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