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- W2945552925 abstract "Assuming that inflation is followed by a phase where the energy density of the Universe is dominated by a component with a general equation of state, we evaluate the spectrum of primordial gravitational waves induced in the post-inflationary Universe. We show that if the energy density of the Universe is dominated by a component $phi$ before Big Bang nucleosynthesis, its equation of state could be constrained by gravitational wave experiments depending on the ratio of energy densities of $phi$ and radiation, and also the temperature at the end of the $phi$ dominated era. Also, we discuss the impact of scale dependence of tensor modes on the primordial gravitational wave spectrum during the $phi$-domination. These models are motivated by beyond Standard Model physics and scenarios for non-thermal production of dark matter in the early Universe. We also constrain the parameter space of the tensor spectral index and the tensor-to-scalar ratio, using the experimental limits from gravitational wave experiments." @default.
- W2945552925 created "2019-05-29" @default.
- W2945552925 creator A5013843853 @default.
- W2945552925 creator A5035123245 @default.
- W2945552925 date "2019-09-03" @default.
- W2945552925 modified "2023-10-17" @default.
- W2945552925 title "Primordial gravitational waves in nonstandard cosmologies" @default.
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