Gravitational waves in hybrid quintessential inflationary models

Sá, Paulo; Henriques, Alfredo B.

http://hdl.handle.net/10400.1/12071

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Authors

Sá, Paulo

Henriques, Alfredo B.

Abstract(s)

The generation of primordial gravitational waves is investigated within the hybrid quintessential inflationary model. Using the method of continuous Bogoliubov coefficients, we calculate the full gravitational-wave energy spectrum. The post-inflationary kination period, characteristic of quintessential inflationary models, leaves a clear signature on the spectrum, namely, a sharp rise of the gravitational-wave spectral energy density Omega(GW) at high frequencies. For appropriate values of the parameters of the model, Omega(GW) can be as high as 10(-12) in the MHz-GHz range of frequencies.