Discrete breathers in a triangular β-Fermi-Pasta-Ulam-Tsingou lattice

• Main Authors: Babicheva, Rita I., Semenov, Alexander S., Soboleva, Elvira G., Kudreyko, Aleksey A., Zhou, Kun, Dmitriev, Sergey V.
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Science::Physics; Breathers; Nonlinear Dynamics
• Online Access: https://hdl.handle.net/10356/151109
• Institution: Nanyang Technological University

A practical approach to the search for (quasi-) discrete breathers (DBs) in a triangular β-FPUT lattice (after Fermi, Pasta, Ulam, and Tsingou) is proposed. DBs are obtained by superimposing localizing functions on delocalized nonlinear vibrational modes (DNVMs) having frequencies above the phonon s...