2010

Primordial Perturbations in Einstein-Aether and BPSH Theories

Armendariz-Picon, Cristian, Sierra, Noela Farina, Garriga, Jaume

Understand

We study the primordial perturbations generated during a stage of single-field inflation in Einstein-aether theories.

Quantum fluctuations of the inflaton and aether fields seed long wavelength adiabatic and isocurvature scalar perturbations, as well as transverse vector perturbations.
Geometrically, the isocurvature mode is the potential for the velocity field of the aether with respect to matter.
For a certain range of parameters, this mode may lead to a sizable random velocity of the aether within the observable universe.

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