Quantum cosmological perturbations: predictions and observations

By V. Mukhanov. 2013

169 citations recorded by the source corpus.

I consider the generic model independent predictions of the theory of quantum cosmological perturbations. To describe the stage of cosmic inflation, where these perturbations are amplified, the hydrodynamical approach is used. The inflationary stage is completely characterized by the deviation of the equation of state from cosmological constant which is a smooth function of the number of e-folds until the end of inflation. It is shown that in this case the spectral index should deviate from the flat one at least by 3 percent irrespective of any particular scenario. Given the value of the spectral index a lower bound on the amount of gravitational waves produced is derived. Finally the relation between effective hydrodynamical description of inflation and inflationary scenarios is discussed.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/755f40b4dd1ba2986f9b912f739c9a70711f121c

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Citations in the corpus

Mimetic Gravity: A Review of Recent Developments and Applications to Cosmology and Astrophysics (2016, background): “Inflation also purports to be the mechanism generating primordial inhomogeneities which are quantum in origin [237, 238], providing the seeds which grow under gravitational instability to form the large-scale”
Primordial gravitational waves for universality classes of pseudoscalar inflation (2016, methodology): “[12, 13], which covers the vast majority of single-field slow-roll inflation models and is based on expressing the first slow-roll parameter as”
Universality classes of inflation (2013, unknown): “Related results can be found in [2], where the same universality classes were derived by different means.”
Superconformal inflationary α-attractors (2013, background): “between the different 1/N universality classes identified in [19,20].”
Science with the space-based interferometer LISA. IV: probing inflation with gravitational waves (2016, background): “Among the countless inflation models on the market, a vast amount of the single-field inflation models can be (approximately) described by the following ansatz for the first slow-roll parameter [95],”