Anisotropic power-law inflation for a two scalar fields model
Anisotropic power-law inflation for a two scalar fields model
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二标量场模型的各向异性幂律膨胀
DOI：
10.1103/physrevd.83.123002
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发表时间：
2011
影响因子：
5
通讯作者：
I. Lin
中科院分区：
文献类型：
--
作者：
Tuan Q Do;W. Kao;I. Lin
在具有单标量场的弦理论中，一类特殊的比安奇I型膨胀解被认为打破了宇宙无毛定理，它不能接近后期的各向同性膨胀解.我们将用一种新的微扰方法证明，当引入一个额外的幻影场时，暴胀解存在一个不稳定的模。结果表明，不稳定模的存在与极早期宇宙中可能存在的额外场密切相关。
A special class of Bianchi type I expanding solutions in a string motivated theory with a single scalar field has been speculated to break the cosmic no-hair theorem that will not approach the late time isotropic expanding solution. We will show by a new perturbation approach that an unstable mode for the inflationary solutions exists when an additional phantom field is introduced. The result indicates that the existence of an unstable mode is closely related to the extra fields that could be present during the very early Universe.