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- W4311886464 abstract "Abstract We calculate the primordial power spectrum of tensor perturbations, within the emergent universe scenario, incorporating a version of the Continuous Spontaneous Localization (CSL) model as a mechanism capable of: breaking the initial symmetries of the system, generating the perturbations, and also achieving the quantum-to-classical transition of such perturbations. We analyze how the CSL model modifies the characteristics of the B -mode CMB polarization power spectrum, and we explore their differences with current predictions from the standard concordance cosmological model. We have found that, regardless of the CSL mechanism, a confirmed detection of primordial B -modes that fits to a high degree of precision the shape of the spectrum predicted from the concordance $$Lambda $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>Λ</mml:mi> </mml:math> CDM model, would rule out one of the distinguishing features of the emergent universe. Namely, achieving a best fit to the data consistent with the suppression observed in the low multipoles of the angular power spectrum of the temperature anisotropy of the CMB. On the contrary, a confirmed detection that accurately exhibits a suppression of the low multipoles in the B -modes, would be a new feature that could be considered as a favorable evidence for the emergent scenario. In addition, we have been able to establish an upper bound on the collapse parameter of the specific CSL model used." @default.
- W4311886464 created "2023-01-02" @default.
- W4311886464 creator A5039116683 @default.
- W4311886464 creator A5048766289 @default.
- W4311886464 creator A5054596075 @default.
- W4311886464 creator A5054947281 @default.
- W4311886464 date "2022-12-19" @default.
- W4311886464 modified "2023-10-14" @default.
- W4311886464 title "Emergent universe: tensor perturbations within the CSL framework" @default.
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