https://doi.org/10.1140/epjc/s10052-016-3924-0
Regular Article - Theoretical Physics
Scale-invariant power spectra from a Weyl-invariant scalar–tensor theory
1
Institute of Basic Sciences and Department of Computer Simulation, Inje University, Gimhae, 621-749, Korea
2
Department of Physics, Sogang University, Seoul, 121-742, Korea
* e-mail: ysmyung@inje.ac.kr
Received:
18
August
2015
Accepted:
1
February
2016
Published online:
16
February
2016
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.
© The Author(s), 2016
