Superhorizon scale
= Superhorizon scale
= Super-Hubble scale
{synonym}
A cosmological mode is on a superhorizon scale when its physical wavenumber is smaller than the Hubble expansion rate, $k/a\ll H$, equivalently $k\ll aH$.
= Superhorizon scale
= Super-Hubble scale
{synonym}
A cosmological mode is on a superhorizon scale when its physical wavenumber is smaller than the Hubble expansion rate, $k/a\ll H$, equivalently $k\ll aH$.