Generalized Space-time Noncommutative Inflation

Abstract

We study the noncommutative inflation with a time-dependent noncommutativity between space and time. From the numerical analysis of power law inflation, there are clues that the CMB spectrum indicates a nonconstant noncommutative inflation. Then we extend our treatment to the inflation models with more general noncommutativity and find that the scalar perturbation power spectrum depends sensitively on the time varying of the spacetime noncommutativity. This stringy effect may be probed in the future cosmological observations.

15 pages, 2 figures

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• Faraday Rotation in Global Accretion Disk Simulations: Implications for Sgr A*
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• Understanding the Geometry of Astrophysical Magnetic Fields
• Gravitational Nanolensing from Subsolar Mass Dark Matter Halos
• Reexamination of inflation in noncommutative space-time after Planck results
• One more step toward the noncommutative brane inflation
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