2021
DOI: 10.48550/arxiv.2112.00461
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The anti-Fermi-Pasta-Ulam-Tsingou problem in one-dimensional diatomic lattices

Sihan Feng,
Weicheng Fu,
Yong Zhang
et al.

Abstract: We study systematically the thermalization dynamics of one-dimensional diatomic lattices (which represents the simplest system possessing multi-branch phonons) of the Fermi-Pasta-Ulam-Tsingou (FPUT)-β and the Toda, and focus on how the system relaxes to the equilibrium state when the energy is initially injected into partial the highest-frequency optical modes, which is called the anti-FPUT problem comparing with the original FPUT problem (low frequency excitations of the monatomic lattice). We show numericall… Show more

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