arXiv:1005.3287·v1·High Energy Physics — Theory
Cosmological diagrammatic rules
Steven B. Giddings🇺🇸 · Martin S. Sloth🇨🇭
Abstract
A simple set of diagrammatic rules is formulated for perturbative evaluation of ``in-in" correlators, as is needed in cosmology and other nonequilibrium problems. These rules are both intuitive, and efficient for calculational purposes.
Comments: 7 pages, 3 figures