Review of Local Non-Gaussianity from Multifield Inflation
Figure 2
(a) shows the trajectory considered for the parameters given after (66) superimposed on a contour plot of the potential. The trajectory is shown from the time of horizon crossing at and runs until the end of inflation at . The square on the trajectory, labelled with , indicates a point along the trajectory one -folding before inflation ends as and roll towards zero. This shows that the fields roll much more quickly during the final stage of inflation, and the trajectory curves near the end. (b) shows the potential for the same parameter values. Notice that inflation ends on the plateau long before the potential becomes negative.
