title: Dynamics of solitary wave scattering in the Fermi-Pasta-Ulam model.
abstract: In this Letter, we study the scattering dynamics of a pair of solitary waves in the Fermi-Pasta-Ulam model with interaction potential V(x)=alphax(2)/2+x(4)/4 and establish a quantitative connection between the scattering property and the energy transport behavior. The energy and momentum conservation laws are obtained and the scattering rates of solitary waves are calculated. Our studies suggest that the anharmonic limit model with alpha=0 can be taken as a paradigm model for studying lattice solitary waves.
authors.affiliation: Physics Department of Xiamen University, Xiamen 361005, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
authors.forename: Zenying
authors.initials: Z
authors.lastname: Wen
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dezhi
authors.initials: D
authors.lastname: Zheng