Nominated as an outstanding PhD thesis by the Nagoya University, Japan Skillfully describes the development of the complete formalism for the second-order cosmological perturbation theory, involving vector and tensor modes Proposes a scenario of magnetic field generation in the second-order perturbation theory Quantifies the weak lensing signals from the second-order vector and tensor modes to provide forecasts for future experiments

Autorentext
Dr. Shohei Saga is a JSPS research Fellow at Yukawa Institute for Theoretical Physics, Kyoto University. His work mainly involves observational cosmology. He received his Bachelor of Science from Nagoya University in 2012, and his Master and Doctor of Science from the Department of Physics, Nagoya University in 2014 and 2017, respectively. In March 2014, he was awarded the 2013 Dean Prize by the Department of Physics, Nagoya University.

Inhalt
Introduction.- Basics of Cosmological Perturbation Theory.- Generation of Magnetic Fields.- Weak Lensing.- 21cm Lensing in the Dark Ages.- Summary of this Thesis.