Attractor-Driven Shape Universality in a Minimal Late-Time Interacting Dark Sector
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| Format: | Recurso digital |
| Sprache: | Englisch |
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2026
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| _version_ | 1866901908756627456 |
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| author | okada, masaki |
| author_facet | okada, masaki |
| contents | <blockquote> <p>This work demonstrates that viable late-time interacting dark-sector solutions collapse onto a one-dimensional ridge due to fast–slow dynamical reduction near a scalar-field dominated fixed point.</p> <p> </p> <p>Across 76 numerically verified viable solutions, the interaction history exhibits near-universal shape (CV < 1% after alignment), with the peak amplitude linearly related to the effective amplitude parameter.</p> <p> </p> <p>The ridge structure is interpreted as the projection of an attracting invariant manifold, providing a dynamical explanation for the narrow viable band observed in parameter space.</p> <p> </p> <p>A covariant embedding via disformal coupling and a schematic derivation of the interaction four-vector are provided to establish microphysical consistency.</p> </blockquote> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_18735876 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Attractor-Driven Shape Universality in a Minimal Late-Time Interacting Dark Sector okada, masaki dark sector interaction cosmology dynamical systems shape universality growth suppression <blockquote> <p>This work demonstrates that viable late-time interacting dark-sector solutions collapse onto a one-dimensional ridge due to fast–slow dynamical reduction near a scalar-field dominated fixed point.</p> <p> </p> <p>Across 76 numerically verified viable solutions, the interaction history exhibits near-universal shape (CV < 1% after alignment), with the peak amplitude linearly related to the effective amplitude parameter.</p> <p> </p> <p>The ridge structure is interpreted as the projection of an attracting invariant manifold, providing a dynamical explanation for the narrow viable band observed in parameter space.</p> <p> </p> <p>A covariant embedding via disformal coupling and a schematic derivation of the interaction four-vector are provided to establish microphysical consistency.</p> </blockquote> |
| title | Attractor-Driven Shape Universality in a Minimal Late-Time Interacting Dark Sector |
| topic | dark sector interaction cosmology dynamical systems shape universality growth suppression |
| url | https://doi.org/10.5281/zenodo.18735876 |