A simple example of "non-minimal" Pre-Big Bang scenario
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908639699140608 |
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| author | Conzinu, PIetro Gasperini, Maurizio Pavone, Eliseo |
| author_facet | Conzinu, PIetro Gasperini, Maurizio Pavone, Eliseo |
| contents | We give an example of non-minimal pre-big bang scenario able to produce the PTA signal considering a modified evolution of the high-curvature string phase, including the contribution of high-energy string sources. We use a fluid-dinamical model of sources and show that their effective viscosity breaks the $S$-duality symmetry of the tensor-axion perturbation spectra, as in general expected for the non-minimal scenario. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_00995 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A simple example of "non-minimal" Pre-Big Bang scenario Conzinu, PIetro Gasperini, Maurizio Pavone, Eliseo General Relativity and Quantum Cosmology We give an example of non-minimal pre-big bang scenario able to produce the PTA signal considering a modified evolution of the high-curvature string phase, including the contribution of high-energy string sources. We use a fluid-dinamical model of sources and show that their effective viscosity breaks the $S$-duality symmetry of the tensor-axion perturbation spectra, as in general expected for the non-minimal scenario. |
| title | A simple example of "non-minimal" Pre-Big Bang scenario |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2506.00995 |