Cosmology of the spinor emergent universe and scale-invariant perturbations
Cai, YF; Wan YP(万友平); 张新民;Wan, YP; Zhang, XM
刊名PHYSICS LETTERS B
2014
卷号731页码:217-226
学科分类Physics
DOI10.1016/j.physletb.2014.02.042
英文摘要A nonsingular emergent universe cosmology can be realized by a nonconventional spinor field as first developed in [1]. We study the mechanisms of generating scale-invariant primordial power spectrum of curvature perturbation in the frame of spinor emergent universe cosmology. Particularly, we introduce a light scalar field of which the kinetic term couples to the bilinear of the spinor field. This kinetic coupling can give rise to an effective "Hubble radius" for primordial fluctuations which allows the scalar field to become squeezed at large length scales and to form a nearly scale-invariant power spectrum. We study the stability of the backreaction and constrain the forms of the coupling terms. Through a generalized curvaton mechanism, these almost scale independent fluctuations are able to be transferred into curvature perturbation after the epoch of emergence and can thus explain cosmological observations. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
收录类别SCI
WOS记录号WOS:000334094500034
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被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225302
专题中国科学院高能物理研究所_理论物理室_期刊论文
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Cai, YF,Wan YP,张新民;Wan, YP,et al. Cosmology of the spinor emergent universe and scale-invariant perturbations[J]. PHYSICS LETTERS B,2014,731:217-226.
APA Cai, YF,万友平,张新民;Wan, YP,&Zhang, XM.(2014).Cosmology of the spinor emergent universe and scale-invariant perturbations.PHYSICS LETTERS B,731,217-226.
MLA Cai, YF,et al."Cosmology of the spinor emergent universe and scale-invariant perturbations".PHYSICS LETTERS B 731(2014):217-226.
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