We develop a theory of nonlinear cosmological perturbations on superhorizon scales for a multi-component scalar field with a general kinetic term and a general form of the potential in the context of inflationary cosmology. We employ the ADM formalism and the spatial gradient expansion approach valid up to second-order in the expansion. We provide a formalism to obtain the solution in the multi-field case and also derive fully nonlinear gauge transformation rules valid through second-order. These fully nonlinear gauge transformation rules can be used to derive the solution in a desired gauge from the one in a gauge where computations are much simpler.
|出版ステータス||Published - 2012 12 1|
|イベント||22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22 - Hongo, Tokyo, Japan|
継続期間: 2012 11 12 → 2012 11 16
|Other||22nd Workshop on General Relativity and Gravitation in Japan 2012, JGRG 22|
|Period||12/11/12 → 12/11/16|
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