Mode Generating Mechanism in Inflation with Cutoff

Details Mode Generating Mechanism in Inflation with Cutoff Mode Generating Mechanism in Inflation with Cutoff

2000-09-13

arxiv.org/abs/astro-ph/0009209v1

Phys.Rev. D63 (2001) 083514

Astronomy and Astrophysics

Astrophysics

9 pages, LaTeX

Scientific paper

10.1103/PhysRevD.63.083514

In most inflationary models, space-time inflated to the extent that modes of cosmological size originated as modes of wavelengths at least several orders of magnitude smaller than the Planck length. Recent studies confirmed that, therefore, inflationary predictions for the cosmic microwave background perturbations are generally sensitive to what is assumed about the Planck scale. Here, we propose a framework for field theories on curved backgrounds with a plausible type of ultraviolet cutoff. We find an explicit mechanism by which during cosmic expansion new (comoving) modes are generated continuously. Our results allow the numerical calculation of a prediction for the CMB perturbation spectrum.

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