Anisotropic constant-roll inflation for the Dirac–Born–Infeld model
Autor: | Duy H. Nguyen, Tuyen M. Pham, Tuan Q. Do |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: | |
Zdroj: | European Physical Journal C: Particles and Fields, Vol 81, Iss 9, Pp 1-12 (2021) |
Druh dokumentu: | article |
ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-021-09652-1 |
Popis: | Abstract In this paper, we study a non-canonical extension of a supergravity-motivated model acting as a vivid counterexample to the cosmic no-hair conjecture due to its unusual coupling between scalar and electromagnetic fields. In particular, a canonical scalar field is replaced by the string-inspired Dirac–Born–Infeld one in this extension. As a result, exact anisotropic inflationary solutions for this Dirac–Born–Infeld model are figured out under a constant-roll condition. Furthermore, numerical calculations are performed to verify that these anisotropic constant-roll solutions are indeed attractive during their inflationary phase. |
Databáze: | Directory of Open Access Journals |
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