Matches in SemOpenAlex for { <https://semopenalex.org/work/W3207598106> ?p ?o ?g. }
- W3207598106 abstract "The accumulated energy density of the excited entropy modes in multiple field inflationary scenarios can play the role of dark matter. In the usual case of a flat field space without any turning trajectory, only light superhorizon entropy modes can be excited through the gravitational instability. In the case of a negatively curved field space, we show that subhorizon entropy modes can be excited as well through the tachyonic instability induced by the negative curvature of the field space. The latter, which is known as the geometrical destabilization mechanism, allows for the production of entropy modes with masses larger than or at the order of the Hubble expansion rate during inflation, leading to a new dark matter scenario. Due to the contribution of subhorizon modes, the corresponding spectral density has a peak at a scale smaller than its counterpart in the models based on a flat field space. This difference makes our model observationally distinguishable." @default.
- W3207598106 created "2021-10-25" @default.
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- W3207598106 date "2022-02-01" @default.
- W3207598106 modified "2023-10-09" @default.
- W3207598106 title "Dark matter from entropy perturbations in curved field space" @default.
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- W3207598106 doi "https://doi.org/10.1103/physrevd.105.043501" @default.
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