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Note on Power-Law Inflation in Noncommutative Space-Time

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arxiv 1404.0168 v1 pith:UOL5RVUU submitted 2014-04-01 astro-ph.CO hep-th

classification astro-ph.COhep-th
keywords modelinflationnoncommutativespace-timepower-lawbicep2calculateconfronting
verification ladder T0 review T1 audit T2 compute T3 formal
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In this paper, we propose a new method to calculate the mode functions in the noncommutative power-law inflation model. In this model, all the modes created when the stringy space-time uncertainty relation is satisfied are generated inside the Hubble horizon during inflation. It turns out that a linear term describing the noncommutative space-time effect contributes to the power spectra of the scalar and tensor perturbations. Confronting this model with latest results from \textit{Planck} and BICEP2, we constrain the parameters in this model and we find it is well consistent with observations.

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