Fluid Inflation

Abstract

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 $f_{NL}=5/2$.

Minor revisions, discussions improved, new references added, JCAP published version

References in corpus (15)

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Cited by in corpus (17)

• Loop Corrections to Standard Model Fields in Inflation
• In-in and $\delta N$ calculations of the bispectrum from non-attractor single-field inflation
• Phase Space Analysis of the Accelerating Multi-fluid Universe
• Asymmetric Sky from the Long Mode Modulations
• Breaking discrete symmetries in the effective field theory of inflation
• Anisotropic Inflation with the non-Vacuum Initial State
• The expected anisotropy in solid inflation
• Shortcomings of New Parametrizations of Inflation
• Fluids, Superfluids and Supersolids: Dynamics and Cosmology of Self Gravitating Media
• Global adiabaticity and non-Gaussianity consistency condition
• Cosmological Perturbations and the Weinberg Theorem
• Inflation and Bounce from Classical and Loop Quantum Cosmology Imperfect Fluids
• Boosting GWs in Supersolid Inflation
• Jump in fluid properties of inflationary universe to reconcile scalar and tensor spectra
• Superpotential method and the amplification of inflationary perturbations
• $\Delta N$ Formalism and Conserved Currents in Cosmology
• Adiabatic Media Inflation