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Noncommutative models in patch cosmology

Gianluca Calcagni
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Abstract

We consider several classes of noncommutative inflationary models within an extended version of patch cosmological braneworlds, starting from a maximally invariant generalization of the action for scalar and tensor perturbations to a noncommutative brane embedded in a commutative bulk. Slow-roll expressions and consistency relations for the cosmological observables are provided, both in the UV and IR region of the spectrum; the inflaton field is assumed to be either an ordinary scalar field or a Born-Infeld tachyon. The effects of noncommutativity are then analyzed in a number of ways and energy regimes.

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Gianluca Calcagni. 2004-11-20. Noncommutative models in patch cosmology. https://doi.org/10.1103/physrevd.70.103525

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