de Sitter Excited State in Heterotic E_8 x E_8 Theory
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909967762587648 |
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| author | Brahma, Suddhasattwa Dasgupta, Keshav Kulinich, Bohdan Maji, Archana Ramadevi, P. Tatar, Radu |
| author_facet | Brahma, Suddhasattwa Dasgupta, Keshav Kulinich, Bohdan Maji, Archana Ramadevi, P. Tatar, Radu |
| contents | We devise a novel duality sequence to study late-time cosmology in the heterotic E_8 x E_8 setup of Horava and Witten with dynamical walls that are moving towards each other. Surprisingly, we find that the dimensionally reduced four-dimensional theory does not violate NEC and therefore we do not see either a bouncing or an ekpyrotic phase. Instead, our four-dimensional setup shows a transient de Sitter phase that lies well within the trans-Planckian bound. This opens up a myriad of possibilities of addressing both phenomenological and cosmological issues, and here we concentrate on one such interesting model, an axionic cosmology with temporally varying axionic coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_09449 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | de Sitter Excited State in Heterotic E_8 x E_8 Theory Brahma, Suddhasattwa Dasgupta, Keshav Kulinich, Bohdan Maji, Archana Ramadevi, P. Tatar, Radu High Energy Physics - Theory General Relativity and Quantum Cosmology We devise a novel duality sequence to study late-time cosmology in the heterotic E_8 x E_8 setup of Horava and Witten with dynamical walls that are moving towards each other. Surprisingly, we find that the dimensionally reduced four-dimensional theory does not violate NEC and therefore we do not see either a bouncing or an ekpyrotic phase. Instead, our four-dimensional setup shows a transient de Sitter phase that lies well within the trans-Planckian bound. This opens up a myriad of possibilities of addressing both phenomenological and cosmological issues, and here we concentrate on one such interesting model, an axionic cosmology with temporally varying axionic coupling. |
| title | de Sitter Excited State in Heterotic E_8 x E_8 Theory |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2412.09449 |