Improved cosmological fits with quantized primordial power spectra

We observationally examine cosmological models based on primordial power spectra with quantized wave vectors. Introducing a linearly quantized power spectrum with k0 = 3.225 ?? 10???4 Mpc???1 and spacing ??k = 2.257 ?? 10???4 Mpc???1 provides a better fit to the Planck 2018 observations than the concordance baseline, with ????2 = ???8.55. Extending the results of Lasenby et al. [preceding paper, Perturbations and the future conformal boundary, Phys. Rev. D 105, 083514 (2022)], we show that the requirement for perturbations to remain finite beyond the future conformal boundary in a universe containing dark matter and a cosmological constant results in a linearly quantized primordial power spectrum. It is found that the infrared cutoffs for this future conformal boundary quantized cosmology do not provide cosmic microwave background power spectra compatible with observations, but future theories may predict more observationally consistent quantized spectra.

Automated summary

In this paper, we observationally examine cosmological models based on primordial power spectra with quantized wave vectors. We find that introducing a linearly quantized power spectrum provides a better fit to the Planck 2018 observations, and the requirement for perturbations to remain finite beyond the future conformal boundary results in a linearly quantized primordial power spectrum. However, the infrared cutoffs for this quantized cosmology are not compatible with observed cosmic microwave background power spectra, but future theories may predict more observationally consistent quantized spectra.