Scale-invariant power spectra from a Weyl-invariant scalar–tensor theory

The European Physical Journal C

Young-Jai Park¹  Yun Soo Myung² 

[1] Department of Physics, Sogang University, 121-742, Seoul, Korea;Institute of Basic Sciences and Department of Computer Simulation, Inje University, 621-749, Gimhae, Korea;

关键词: Scalar Theory;    Conformal Gravity;    Weyl Transformation;    Weyl Invariance;    Scalar Power Spectrum;   

DOI  :  10.1140/epjc/s10052-016-3924-0

来源: Springer

【 摘 要 】

We obtain scale-invariant scalar and tensor power spectra from a Weyl-invariant scalar–tensor theory in de Sitter spacetime. This implies that the Weyl invariance guarantees the implementation of the scale invariance of the power spectrum in de Sitter spacetime. We establish a deep connection between the Weyl invariance of the action and the scale invariance of the power spectrum in de Sitter spacetime.

【 授权许可】

CC BY