Cosmology has become precision science due to rapid developments of observational techniques. In particular, WMAP and Planck satellites have provided us with high precision data of temperature fluctuations of the cosmic microwave background radiation, which reveal the universe just 0.4 million years after the Big Bang. From the statistical analysis of the temperature fluctuations, we can extract information about the very early universe, namely at 10^-34 seconds after the Big Bang, which enables us to know the physics of the microscopic world. Although there are a lot of interesting topics in cosmology, I am working on an inflationary scenario through which we can explore the microscopic world. The aim of my research is to find new physics through interdisciplinary studies of cosmology and elementary particle theory.

Main Publications

• J. Soda, ``Statistical Anisotropy from Anisotropic Inflation,'' Class. Quant. Grav. 29, 083001 (2012).
• R. Gregory, S. Kanno and J. Soda, ``Holographic Superconductors with Higher Curvature Corrections,'' JHEP 0910, 010 (2009).
• T. Takahashi and J. Soda, ``Chiral Primordial Gravitational Waves from a Lifshitz Point,'' Phys. Rev. Lett. 102, 231301 (2009).
• M. Watanabe, S. Kanno and J. Soda, ``Inflationary Universe with Anisotropic Hair,'' Phys. Rev. Lett. 102, 191302 (2009).
• S. Yokoyama and J. Soda, ``Primordial statistical anisotropy generated at the end of inflation,'' JCAP 0808, 005 (2008).
• K. Koyama and J. Soda,``Evolution of cosmological perturbations in the brane world,'' Phys.Rev. D62, 123502 (2000).