Tachyon inflation in the holographic braneworld
| Autor: | Milan Milosevic, Marko Stojanović, Neven Bilic, Dragoljub D. Dimitrijevic, Goran S. Djordjevic |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
High Energy Physics - Theory
Cosmology and Nongalactic Astrophysics (astro-ph.CO) FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Cosmology General Relativity and Quantum Cosmology Theoretical physics symbols.namesake High Energy Physics::Theory 0103 physical sciences D-brane Planck Inflation (cosmology) Physics 010308 nuclear & particles physics Astronomy and Astrophysics Action (physics) Tachyon High Energy Physics - Theory (hep-th) symbols Anti-de Sitter space Brane Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | A model of tachyon inflation is proposed in the framework of holographic cosmology. The model is based on a holographic braneworld scenario with a D3-brane located at the holographic boundary of an asymptotic ADS$_5$ bulk. The tachyon field that drives inflation is represented by a DBI action on the brane. We solve the evolution equations analytically in the slow-roll regime and solve the exact equations numerically. We calculate the inflation parameters and compare the results with Planck 2018 data. 27 pages 6 figures, substantially revised version accepted for publication in JCAP. A comment on primordial non-Gaussianity added, an appendix on cosmological perturbations added, a minor mistake in the equation for spectral density corrected resulting in slight modifications of the plots, 7 references added, typos corrected |
| Databáze: | OpenAIRE |
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