Equations of motion in Double Field Theory: from classical particles to quantum cosmology

Abstract

The equation of motion for a point particle in the background field of double field theory is considered. We find that the motion is described by a geodesic flow in the doubled geometry. Inspired by analysis on the particle motion, we propose a modified model of quantum string cosmology, which includes two scale factors. The report is based on Phys. Rev. D84 (2011) 124049 [arXiv:1108.5795].

4 pages, 1 eps figure. To appear in the Proceedings of 21st Workshop in General Relativity and Gravitation in Japan (JGRG21), held in Sakura Hall, Katahira Campus, Tohoku University, Sendai, Japan (26 - 29 September 2011)