http://arxiv.org/abs/1607.05328
We investigate the effect of adiabatic regularisation on both the tensor- and scalar-perturbation power spectra in \textit{nonminimally} coupled chaotic inflation. Similar to that of the \textit{minimally} coupled general single-field inflation, we find that the subtraction term is suppressed by an exponentially decaying factor involving the number of $ e $-folds. By following the subtraction term long enough beyond horizon crossing, the regularised power spectrum tends to the bare power spectrum. This study justifies the use of the bare power spectrum in standard calculations.
A. Alinea
Wed, 20 Jul 16
2/66
Comments: 15 pages