Massive de Sitter superhorizon scalar mode
= Massive de Sitter superhorizon scalar mode
{title2=$\nu=\sqrt{9/4-m^2/H^2}$}
In the <de Sitter approximation>, a canonically rescaled scalar has superhorizon powers $(-\tau)^{1/2\pm\nu}$. The physical field has powers $(-\tau)^{3/2\pm\nu}$. For $H^2<m^2<2H^2$, both physical branches decay, while the slower rescaled branch grows. The generic late-time <dimensionless power spectrum> is proportional to $(k/(aH))^{3-2\nu}$.