http://arxiv.org/abs/1711.08270
We propose a novel scenario of inflation, in which the inflaton is identified as the lightest mode of an angular field in a compactified fifth dimension. The periodic effective potential exhibits exponentially flat plateaus, so that a sub-Planckian field excursion without hilltop initial conditions is naturally realized. We can obtain consistent predictions with observations on the spectral index and the tensor-to-scalar ratio.
J. Gong and C. Shin
Thu, 23 Nov 17
40/52
Comments: 5 pages, 2 figures