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Browsing by Author "Sorbo, Lorenzo"

Now showing 1 - 3 of 3
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    Cosmology with pNGB quintessence
    (2012-07-30) Sorbo, Lorenzo
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    Nonstandard tensor modes from inflation
    (2011-12-09) Sorbo, Lorenzo
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    Odd Tensor Modes from Inflation
    (2015) Sorbo, Lorenzo
    The existence of a primordial spectrum of gravitational waves is a generic prediction of inflation. Here I will discuss how the coupling of a pseudoscalar inflaton to a gauge field can induce, in a two-step process, gravitational waves with unusual properties such as: (i) a net chirality (ii) a blue spectrum (iii) being detectable in the (relatively) near future by ground-based gravitational interferometers (iv) large nongaussianities even if the scalar perturbations are approximately gaussian