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