395 citations · 1.1k across the 6 of their papers we have counts for
6 papers
Inflation with Multi-Vector-Hair: The Fate of Anisotropy
Kei Yamamoto, Masa-aki Watanabe, Jiro Soda
We study inflation with multiple vector fields. In the presence of non-trivial couplings between the inflaton and the vector fields, it turns out that no-hair conjecture does not h…
Anisotropic Power-law Inflation
Sugumi Kanno, Jiro Soda, Masa-aki Watanabe
We study an inflationary scenario in supergravity model with a gauge kinetic function. We find exact anisotropic power-law inflationary solutions when both the potential function f…
Imprints of anisotropic inflation on the cosmic microwave background
Masa-aki Watanabe, Sugumi Kanno, Jiro Soda
We study the imprints of anisotropic inflation on the CMB temperature fluctuations and polarizations. The statistical anisotropy stems not only from the direction dependence of cur…
The Nature of Primordial Fluctuations from Anisotropic Inflation
Masa-aki Watanabe, Sugumi Kanno, Jiro Soda
We study the statistical nature of primordial fluctuations from an anisotropic inflation which is realized by a vector field coupled to an inflaton. We find a suitable gauge, which…
Cosmological Magnetic Fields from Inflation and Backreaction
Sugumi Kanno, Jiro Soda, Masa-aki Watanabe
We study the backreaction problem in a mechanism of magnetogenesis from inflation. In usual analysis, it has been assumed that the backreaction due to electromagnetic fields spoils…
Inflationary Universe with Anisotropic Hair
Masa-aki Watanabe, Sugumi Kanno, Jiro Soda
We study an inflationary scenario with a vector field coupled with an inflaton field and show that the inflationary universe is endowed with anisotropy for a wide range of coupling…