PIRSA:10100062 Conference Cosmology

DOI10.48660/10100062

Conference/School: IR issues and loops in de Sitter space - 2010

Kumar, J. (2010). The Feynman Propagator and Correlation Functions in an Inflating Spacetime. Perimeter Institute. https://pirsa.org/10100062

Kumar, Jason. The Feynman Propagator and Correlation Functions in an Inflating Spacetime. Perimeter Institute, Oct. 27, 2010, https://pirsa.org/10100062 

@misc{ pirsa_PIRSA:10100062,
  doi = {10.48660/10100062},
  url = {https://pirsa.org/10100062},
  author = {Kumar, Jason},
  keywords = {Cosmology},
  language = {en},
  title = {The Feynman Propagator and Correlation Functions in an Inflating Spacetime},
  publisher = {Perimeter Institute},
  year = {2010},
  month = {oct},
  note = {PIRSA:10100062 see, \url{https://pirsa.org}}
}

Abstract

We discuss the definition of the Feynman propagator in de Sitter space. We show that the ambiguities in the propagator zero-mode can be used to make sense of the behavior of low-momentum modes in an inflating space-time. We use this tool to calculate loop corrections to non-Gaussian correlation functions, and show that there are limits where the loop terms dominate. These models can be probed with the Planck satellite.

Resources

Next talk

Related Talks