洛伦兹不变量暗旋量与暴胀
Lorentz invariant dark-spinor and inflation
摘要：
研究了洛伦兹不变非标准旋量场驱动暴胀的可能性。由于这些旋量仅通过引力场具有主导相互作用，因此它们被认为是\emph{Dark Spinors}。我们研究了这些暗旋子如何驱动暴胀，并研究了它们所产生的宇宙学（标量）扰动。虽然暗旋量服从Klein-Gordon方程，但宇宙学扰动的基本理论远比使用正则标量场的理论复杂。例如，扰动的声速不是恒定的，而是随时间变化的。我们发现，为了解释的光谱指数$n_s$的观察值必须有上限的背景NSS场的值。由于NSS对张量谱的修正要求很小，因此张量与标量的比值与正则标量场驱动暴胀的情况一样小。此外，我们还讨论了所得结果与以前用Lorentz不变性破坏理论所得结果的关系。
英文摘要：
We investigate the possibility of the inflation driven by a Lorentz invariant non-standard spinor field. As these spinors are having dominant interaction via gravitational field only, they are considered as \emph{Dark Spinors}. We study how these dark-spinors can drive the inflation and investigate the cosmological (scalar) perturbations generated by them. Though the dark-spinors obey a Klein-Gordon like equation, the underlying theory of the cosmological perturbations is far more complex than the theories which are using a canonical scalar field. For example the sound speed of the perturbations is not a constant but varies with time. We find that in order to explain the observed value of the spectral-index $n_s$ one must have upper bound on the values of the background NSS-field. The tensor to scalar ratio remains as small as that in the case of canonical scalar field driven inflation because the correction to tensor spectrum due to NSS is required to be very small. In addition we discuss the relationship of results with previous results obtained by using the Lorentz invariance violating theories.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
