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Title: Bogoliubov excited states and the Lyth bound

We show that Bogoliubov excited scalar and tensor modes do not alleviate Planckian evolution during inflation if one assumes that r and the Bogoliubov coefficients are approximately scale invariant. We constrain the excitation parameter for the scalar fluctuations, β, and tensor perturbations, β-tilde , by requiring that there be at least three decades of scale invariance in the scalar and tensor power spectrum. For the scalar fluctuations this is motivated by the observed nearly scale invariant scalar power spectrum. For the tensor fluctuations this assumption may be shown to be valid or invalid by future experiments.
Authors:
; ;  [1]
  1. Department of Physics and Texas Cosmology Center, The University of Texas at Austin, TX 78712 (United States)
Publication Date:
OSTI Identifier:
22373371
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; COSMOLOGICAL INFLATION; EXCITED STATES; FLUCTUATIONS; PERTURBATION THEORY; SCALARS; SCALE INVARIANCE; SPECTRA; TENSORS