Statistical anisotropy from anisotropic inflation

By Jiro Soda. 2012

186 citations recorded by the source corpus.

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 the generality of anisotropic inflation and derive a universal property. We formulate cosmological perturbation theory in anisotropic inflation. Using the formalism, we show that 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.

Subfields: Astronomy and Astrophysics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/e633238b0027fee11593eacd66c246c2d1d71b50

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. A. Banday
2. H. Eriksen
3. Volker Springel
4. F. Hansen
5. P. Lilje
6. S. Vagnozzi
7. Simon D. M. White
8. M. Liguori

In Statistical and Nonlinear Physics

1. Benjamin Dan Wandelt
2. A. Banday
3. M. Sheikh-Jabbari
4. A. Maleknejad
5. Simon D. M. White
6. Jacques Delabrouille
7. D. Hooper
8. M. Liguori

Citations in the corpus

• Gauge fields and inflation (2012, background): “Indeed, anisotropic inflation could be ubiquitous in supergravity [94, 95].”
• Planck2018 results (2018, background): “In PCI15 we found no evidence for such a modulation, but several inflationary models have been constructed which predict this effect (Ackerman et al. 2007; Soda 2012; Tsujikawa 2014).”