Squeezed bispectrum configuration
= Squeezed bispectrum configuration
{title2=$k_L\ll k_S$}
A <primordial bispectrum> is squeezed when one external <Fourier mode> has much smaller <wavenumber> than the other two. Momentum conservation then makes the two short wavevectors almost opposite. This configuration measures the response of short-scale correlations to a long perturbation.