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Statistical Anisotropy from Anisotropic Inflation

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arxiv 1201.6434 v2 pith:UP4TVB7F submitted 2012-01-31 hep-th astro-ph.COgr-qc

Statistical Anisotropy from Anisotropic Inflation

Jiro Soda This is my paper
classification hep-th astro-ph.COgr-qc
keywords anisotropicinflationanisotropycosmicinflationarystatisticalbackgroundconjecture
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We review an inflationary scenario with the anisotropic expansion rate. An anisotropic inflationary universe can be realized by a vector field coupled with an inflaton, which can be regarded as a counter example to the cosmic no-hair conjecture. We show generality of anisotropic inflation and derive a universal property. We formulate cosmological perturbation theory in anisotropic inflation. Using the formalism, we show anisotropic inflation gives rise to the statistical anisotropy in primordial fluctuations. We also explain a method to test anisotropic inflation using the cosmic microwave background radiation (CMB).

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Cited by 3 Pith papers

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    An Einstein-Cartan ekpyrotic model with a steep-to-plateau scalar potential supports a torsion-driven nonsingular bounce in homogeneous contraction without chaotic behavior in the explored parameter space.

  3. Power-law Bianchi type I inflation with multiple vector fields

    gr-qc 2025-11 conditional novelty 5.0

    Exact power-law Bianchi type I inflationary solutions are found for one scalar field coupled to up to three vector fields, with stability governed by the relative sizes of the gauge-coupling exponents.