title: Comparison of mode-coupling theory with molecular dynamics simulations from a unified point of view.
abstract: We study the tagged-particle dynamics by solving equations of the mode-coupling theory (MCT). The numerical solutions are compared with results obtained by the molecular dynamics (MD) simulations from a unified point of view proposed by Tokuyama [Phys. Rev. E 80, 031503 (2009)]. We propose a way of comparison in which the reduced long-time self-diffusion coefficient is used to characterize states of the system. The comparison reveals that the tagged-particle dynamics calculated from MCT qualitatively deviates from that obtained by MD. Our results suggest that the deviation originates from the starting equation of MCT.
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka 819-0395, Japan. narumi@athena.ap.kyushu-u.ac.jp
authors.forename: Takayuki
authors.initials: T
authors.lastname: Narumi
authors.forename: Michio
authors.initials: M
authors.lastname: Tokuyama