Power Spectra in Spacetime Noncommutative Inflation

Details Power Spectra in Spacetime Noncommutative Inflation Power Spectra in Spacetime Noncommutative Inflation

2003-11-17

arxiv.org/abs/astro-ph/0311378v4

Nucl.Phys.B713:219-234,2005

Astronomy and Astrophysics

Astrophysics

19 pages, 6 figures, harvmac; 2 references added; only references added; Accepted for publication in Nucl. Phys. B

Scientific paper

10.1016/j.nuclphysb.2005.02.002

String/M theory inspires an uncertainty relation between space and time which deviates from general relativity. It is possible to explore this deviation from cosmological observations, in particular from the CMB fluctuation spectrum. This paper extends some previous observations to more general inflation schemes, we find that the noncommutative spacetime effects always suppress the power spectrum, of both the scalar and tensor perturbations, and may provide a large enough running of the spectral index to fit the WMAP data in the inflation model.

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