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- W2092245367 abstract "We analyze the Eckhaus instability of plane waves in the one-dimensional complex Ginzburg–Landau equation (CGLE) and describe the nonlinear effects arising in the Eckhaus unstable regime. Modulated amplitude waves (MAWs) are quasi-periodic solutions of the CGLE that emerge near the Eckhaus instability of plane waves and cease to exist due to saddle-node (SN) bifurcations. These MAWs can be characterized by their average phase gradient ν and by the spatial period P of the periodic amplitude modulation. A numerical bifurcation analysis reveals the existence and stability properties of MAWs with arbitrary ν and P. MAWs are found to be stable for large enough ν and intermediate values of P. For different parameter values they are unstable to splitting and attractive interaction between subsequent extrema of the amplitude. Defects form from perturbed plane waves for parameter values above the SN of the corresponding MAWs. The break-down of phase chaos with average phase gradient ν≠0 (“wound-up phase chaos”) is thus related to these SNs. A lower bound for the break-down of wound-up phase chaos is given by the necessary presence of SNs and an upper bound by the absence of the splitting instability of MAWs." @default.
- W2092245367 created "2016-06-24" @default.
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- W2092245367 date "2003-01-01" @default.
- W2092245367 modified "2023-09-27" @default.
- W2092245367 title "Nonlinear analysis of the Eckhaus instability: modulated amplitude waves and phase chaos with nonzero average phase gradient" @default.
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- W2092245367 doi "https://doi.org/10.1016/s0167-2789(02)00688-7" @default.
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