Answers are grounded in this paper and cite their sources.
In this work we present an inflationary mechanism based on fluid dynamics. Starting with the action for a single barotropic perfect fluid, we outline the procedure to calculate the power spectrum and the bispectrum of the curvature perturbation. It is shown that a perfect barotropic fluid naturally gives rise to a non-attractor inflationary universe in which the curvature perturbation is not frozen on super-horizon scales. We show that a scale-invariant power spectrum can be obtained with the local non-Gaussianity parameter f NL = 5/2.
No takes yet. Share an insight, caveat, or question.
Chen et al. (2013) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: