The trouble with asymptotically safe inflation
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In this paper we investigate the perturbation theory of asymptotically safe inflation and we find that all modes of gravitational waves perturbation become ghosts in order to achieve a large enough number of e-folds. Formally we can calculate the power spectrum of gravitational waves perturbation, but we find that it is negative. It indicates that there is serious trouble with asymptotically safe inflation.
KeywordsGhost Asymptotic Safety Renormalization Group Flow Einstein Hilbert Term Effective Coupling Constant
QGH would like to thank Henry Tye for helpful discussions. This work is supported by the project of Knowledge Innovation Program of Chinese Academy of Science and a grant from NSFC (grant No. 10975167).
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