Bogoliubov excited states and the Lyth bound

Journal Article · Fri Aug 01 00:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/08/058· OSTI ID:22373371

Aravind, Aditya; Lorshbough, Dustin; Paban, Sonia ^[1]

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1. Department of Physics and Texas Cosmology Center, The University of Texas at Austin, TX 78712 (United States)

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.

• OSTI ID: 22373371
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 08; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
APPROXIMATIONS
COSMOLOGICAL INFLATION
EXCITED STATES
FLUCTUATIONS
PERTURBATION THEORY
SCALARS
SCALE INVARIANCE
SPECTRA
TENSORS