PIRSA:17100084 Scientific Series Cosmology

DOI10.48660/17100084

Series: Cosmology and Gravitation

Solomon, A. (2017). Aspects of field theory with higher derivatives. Perimeter Institute. https://pirsa.org/17100084

Solomon, Adam. Aspects of field theory with higher derivatives. Perimeter Institute, Oct. 24, 2017, https://pirsa.org/17100084 

@misc{ pirsa_PIRSA:17100084,
  doi = {10.48660/17100084},
  url = {https://pirsa.org/17100084},
  author = {Solomon, Adam},
  keywords = {Cosmology},
  language = {en},
  title = {Aspects of field theory with higher derivatives},
  publisher = {Perimeter Institute},
  year = {2017},
  month = {oct},
  note = {PIRSA:17100084 see, \url{https://pirsa.org}}
}

Abstract

I will discuss related aspects of field theories with higher-derivative Lagrangians but second-order equations of motion, with a focus on the Lovelock and Horndeski classes that have found use in modifications to general relativity. In the first half I will investigate when restricting to such terms is and is not well-justified from an effective field theory perspective. In the second half I will discuss how non-perturbative effects, like domain walls and quantum tunneling, are modified in the presence of these kinetic terms

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