Anisotropic constant-roll inflation for the Dirac-Born-Infeld model

被引：11
作者：
Nguyen, Duy H. [1 ,2 ]
Pham, Tuyen M. [1 ,2 ]
Do, Tuan Q. [1 ,3 ]
机构：
[1] Phenikaa Univ, Phenikaa Inst Adv Study, Hanoi 12116, Vietnam
[2] Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, Hanoi 11307, Vietnam
[3] Phenikaa Univ, Fac Basic Sci, Hanoi 12116, Vietnam
来源：
EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 09期
关键词：
POWER-LAW INFLATION; NO-HAIR THEOREM; COSMOLOGICAL MODELS; UNIVERSE; FLATNESS; HORIZON;
D O I：
10.1140/epjc/s10052-021-09652-1
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
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.
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页数：12
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