title: Stability of nonlinear normal modes in the Fermi-Pasta-Ulam β chain in the thermodynamic limit.
abstract: All possible symmetry-determined nonlinear normal modes (also called simple periodic orbits, one-mode solutions, etc.) in both hard and soft Fermi-Pasta-Ulam β chains are discussed. A general method for studying their stability in the thermodynamic limit as well as its application for each of the above nonlinear normal modes are presented.
authors.affiliation: Institute of Physics, Southern Federal University, Rostov-on-Don, Russia. gchechin@gmail.com
authors.forename: G M
authors.initials: GM
authors.lastname: Chechin
authors.forename: D S
authors.initials: DS
authors.lastname: Ryabov