Primordial non-Gaussianities from inflation

Understand

These notes present a detailed introduction to Maldacena's calculation of the three-point function generated by the simplest class of inflationary models: those with a single inflaton field whose potential satisfies the slow-roll conditions and whose quantum fluctuations start in the asymptotic Bunch-Davies vacuum state.

• The three-point function should be the most readily observed evidence for non-Gaussianities amongst the primordial fluctuations produced by inflation.
• In these inflationary theories the non-Gaussianities are predicted to be extremely small, being naturally suppressed by the small slow-roll parameters.