Scale-invariant scalar spectrum from the nonminimal derivative coupling with fourth-order term
作者： Yun Soo Myung , Taeyoon Moon
DOI: 10.1142/S0218271815500959
关键词:
摘要: An exactly scale-invariant spectrum of scalar perturbation generated during de Sitter spacetime is found from the gravity model nonminimal derivative coupling with fourth-order term. The term generates a healthy (ghost-free) term, while provides an unhealthy (ghost) Harrison-Zel'dovich obtained Fourier transforming propagator in space recovered by computing power its momentum directly. It shows that this truly spectrum, addition to Lee-Wick theory.
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