Improved cosmological fits with quantized primordial power spectra

TL;DR

This paper proposes a linearly quantized primordial power spectrum model that fits Planck 2018 data better than standard models, linking quantum boundary conditions to cosmological observations.

Contribution

It introduces a novel quantized power spectrum model derived from boundary conditions, improving cosmological fit over traditional models.

Findings

Quantized spectrum fits Planck data better with Δχ² = -8.55.

Infrared cutoffs from boundary conditions are incompatible with observations.

Future theories may produce more observationally consistent quantized spectra.

Abstract

We observationally examine cosmological models based on primordial power spectra with quantized wavevectors. Introducing a linearly quantized power spectrum with $k_0=3.225\times10^{-4}\mathrm{Mpc}^{-1}$ and spacing $\Delta k = 2.257 \times 10^{-4} \mathrm{Mpc}^{-1}$ provides a better fit to the Planck 2018 observations than the concordance baseline, with $\Delta \chi^2 = -8.55$. Extending the results of Lasenby et al [1], 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.