Cosmological diagrammatic rules
Steven B. Giddings, Martin S. Sloth
TL;DR
This paper introduces a straightforward set of diagrammatic rules for efficiently computing in-in correlators in cosmology and nonequilibrium physics, simplifying complex calculations.
Contribution
It presents a new, intuitive diagrammatic framework specifically designed for perturbative evaluation of in-in correlators in cosmological and nonequilibrium contexts.
Findings
Rules are both intuitive and computationally efficient.
Applicable to cosmology and other nonequilibrium problems.
Facilitates perturbative calculations of in-in correlators.
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.
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