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arXiv · 1412.7263

Scale-invariant spectrum of Lee-Wick model in de Sitter spacetime

Yun Soo Myung·Taeyoon Moon
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Abstract

We obtain a scale-invariant spectrum from the Lee-Wick model in de Sitter spacetime. This model is a fourth-order scalar theory whose mass parameter is determined by $M^2=2H^2$. The Harrison-Zel'dovich scale-invariant spectrum is obtained by Fourier transforming the propagator in position space as well as by computing the power spectrum directly. It shows clearly that the LW scalar theory provides a truly scale-invariant spectrum in whole de Sitter, while the massless scalar propagation in de Sitter shows a scale-invariant spectrum in the superhorizon region only.

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Yun Soo Myung, Taeyoon Moon. 2014-12-23. Scale-invariant spectrum of Lee-Wick model in de Sitter spacetime. https://doi.org/10.1088/1475-7516%2F2015%2F02%2F044

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