title: Entropy production in a two-dimensional reversible Gray-Scott system.
abstract: The entropy production sigma is calculated in the time evolution processes toward a Turing-like pattern and a chaotic pattern in a two-dimensional reaction-diffusion system. The contributions of reaction and diffusion to the entropy production are evaluated separately. Though its contribution to total sigma is about 5%, the entropy production in diffusion foretells the moving direction of the dots (reaction spots) and the line-shaped patterns. The entropy production of the entire system sigma depicts well the cooperative dynamics and evolution of chaotic dot patterns. It is suggested that sigma can be a scalar measure for quantitative studies of hierarchic pattern dynamics. The relation is also discussed between the bifurcation parameter and the distance from thermodynamic equilibrium.
authors.affiliation: Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5-2, 1-1-1 Higashi, Tsukuba 305-8565, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Mahara
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Shimomura