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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Scalars with Higher Derivatives in Supergravity and Cosmology
Speaker(s): Jean-Luc Lehners
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.
Date: 09/10/2012 - 11:00 am
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