Effects of space-time noncommutativity on the angular power spectrum of the CMB

Details Effects of space-time noncommutativity on the angular power spectrum of the CMB Effects of space-time noncommutativity on the angular power spectrum of the CMB

2003-07-02

arxiv.org/abs/hep-th/0307029v4

Nucl.Phys. B682 (2004) 377-390

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 4 figures, references added, some arguments clarified, to appear in Nuclear Physics B

Scientific paper

10.1016/j.nuclphysb.2004.01.020

We investigate an inflationary model of the universe based on the assumption that space-time is noncommutative in the very early universe. We analyze the effects of space-time noncommutativity on the quantum fluctuations of an inflaton field and investigate their contributions to the cosmic microwave background (CMB). We show that the angular power spectrum l(l+1)C_l generically has a sharp damping for lower l if we assume that the last scattering surface is traced back to fuzzy spheres at the times when large-scale modes cross the Hubble horizon.

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