Video URL

https://pirsa.org/10100062

The Feynman Propagator and Correlation Functions in an Inflating Spacetime

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

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

          @misc{ scivideos_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 for Theoretical Physics},
            year = {2010},
            month = {oct},
            note = {PIRSA:10100062 see, \url{https://scivideos.org/pirsa/10100062}}
          }

Jason Kumar University of Hawaii at Manoa

DOI 10.48660/10100062
Source Repository PIRSA
Collection
Talk Type Conference
Subject

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.