title: One-Dimensional Self-Organization and Nonequilibrium Phase Transition in a Hamiltonian System.
abstract: Self-organization and nonequilibrium phase transitions are well known to occur in two- and three-dimensional dissipative systems. Here, instead, we provide numerical evidence that these phenomena also occur in a one-dimensional Hamiltonian system. To this end, we calculate the heat conductivity by coupling the two ends of our system to two heat baths at different temperatures. It is found that when the temperature difference is smaller than a critical value, the heat conductivity increases with the system size in power law with an exponent considerably smaller than 1. However, as the temperature difference exceeds the critical value, the system's behavior undergoes a transition and the heat conductivity tends to diverge linearly with the system size. Correspondingly, an ordered structure emerges. These findings suggest a new direction for exploring the transport problems in one dimension.
authors.affiliation: Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, Fujian, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Wang
authors.affiliation: Center for Nonlinear and Complex Systems, Università degli Studi dell'Insubria, via Valleggio 11, 22100 Como, Italy and International Institute of Physics, Federal University of Rio Grande do Norte, Campus Universitário - Lagoa Nova, CP. 1613, Natal, Rio Grande do Norte 59078-970, Brazil.
authors.forename: Giulio
authors.initials: G
authors.lastname: Casati