We study cosmological solutions in low-energy effective heterotic string theory, which consists of the Einstein gravity with the Gauss-Bonnet term and a dilaton. And there are non-linear self-interaction terms which looks like recently studied in context of "Galileon" cosmology. We study cosmological solutions with the self-interaction term which includes two arbitrary coupling parameter. We examine the time evolution of the solutions and the question of whether the solutions can describe accelerated expansion of our four-dimensional space in the Einstein frame. We found de-Sitter solutions in our four-dimension when these two parameter are related.
|出版ステータス||Published - 2010|
|イベント||20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 - Kyoto, Japan|
継続期間: 2010 9月 21 → 2010 9月 25
|Other||20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010|
|Period||10/9/21 → 10/9/25|
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