Pramana | |
Thermal conductivity of nonlinear waves in disordered chains | |
Mikhail Ivanchenko11  Nianbei Li1  Sergej Flach11  | |
[1] Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany$$ | |
关键词: Disorder; nonlinear waves; thermal conductivity.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
We present computational data on the thermal conductivity of nonlinear waves in disordered chains. Disorder induces Anderson localization for linear waves and results in a vanishing conductivity. Cubic nonlinearity restores normal conductivity, but with a strongly temperature-dependent conductivity 𜅠(ð‘‡). We ï¬nd indications for an asymptotic low-temperature 𜅠∼ ð‘‡4 and intermediate temperature 𜅠∼ ð‘‡2 laws. These ï¬ndings are in accord with theoretical studies of wave packet spreading, where a regime of strong chaos is found to be intermediate, followed by an asymptotic regime of weak chaos (Laptyeva et al, Europhys. Lett. 91, 30001 (2010)).
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201912040498387ZK.pdf | 192KB | download |