Pre-inflationary vacuum in the cosmic microwave background

摘要: We consider the effects on primordial power spectrum of a period radiation-dominated expansion prior to inflationary era. If inflation lasts total only 60 e-folds or so, boundary condition for quantum modes cannot be taken in short-wavelength limit as standard perturbation calculation. Instead, is set by vacuum state epoch, which corresponds ultraviolet limit. This altered results modulation spectrum. calculate modification best-fit model from WMAP3 data set, and find that suppressed at large scales. The modified favored very weakly temperature polarization data.