Effects of quantum deformations on the spectrum of cosmological perturbations

Sera Cremonini
Phys. Rev. D 68, 063514 – Published 29 September 2003
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Abstract

We consider a quantum deformation of the wave equation on a cosmological background as a toy model for possible trans-Planckian effects. We compute the power spectrum of scalar and tensor fluctuations for power-law inflation, and find a noticeable deviation from the standard result. We consider de Sitter inflation as a special case, and find that the resulting power spectrum is scale invariant. For both inflationary scenarios the departure from the standard spectrum is sensitive to the size of the deformation parameter. A modulation in the power spectrum appears to be a generic feature of the model.

  • Received 9 June 2003

DOI:https://doi.org/10.1103/PhysRevD.68.063514

©2003 American Physical Society

Authors & Affiliations

Sera Cremonini*

  • Department of Physics, Brown University, Providence, Rhode Island 02912, USA

  • *Electronic address: sera@het.brown.edu

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Vol. 68, Iss. 6 — 15 September 2003

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