Scalar and tensor perturbations in DHOST bounce cosmology
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/11/045
Abstract: We investigate the bounce realization in the framework of DHOST cosmology, focusing on the relation with observables. We perform a detailed analysis of the scalar and tensor perturbations during the Ekpyrotic contraction phase, the bounce… read more here.
Keywords: phase; tensor perturbations; cosmology; scalar tensor ... See more keywords
Spectrum of tensor perturbations in warm inflation
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DOI: 10.1103/physrevd.104.083542
Abstract: We compute the spectrum of tensor perturbations in warm inflation. We find that the spectrum, besides the standard component ∝ H/M P associated to the amplification of the tensor vacuum fluctuations, acquires a component ∝… read more here.
Keywords: spectrum tensor; tensor; perturbations warm; warm inflation ... See more keywords
Circular polarization of the cosmic microwave background from vector and tensor perturbations
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DOI: 10.1103/physrevd.99.043501
Abstract: Circular polarization of the cosmic microwave background (CMB) can be induced by Faraday conversion of the primordial linearly polarized radiation as it propagates through a birefringent medium. Recent work has shown that the dominant source… read more here.
Keywords: circular polarization; cosmic microwave; microwave background; tensor perturbations ... See more keywords