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arXiv 1009.0910nlin.PS
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具有延迟非线性响应的离散晶格中的基孤子

Fundamental solitons in discrete lattices with a delayed nonlinear response

A. Maluckov, Lj. Hadzievski, B. A. Malomed

摘要:

非交错局域模的形成动力学晶格可以支持的离散性和非线性的相互作用与有限的弛豫时间。在快速响应的非线性介质中,在现场离散孤子是稳定的,而他们的广泛的站点间对应的是边缘稳定,具有几乎为零的真正的不稳定本征值。当非线性效应缓慢弛豫时,孤子变得不稳定。随着延迟时间的增加,不稳定性的性质发生变化,导致不稳定离散孤子的动力学特性发生变化。它们在快速弛豫介质中形成鲁棒的局域呼吸子,并在晶格中衰减成具有缓慢非线性响应的振荡衍射图案。边缘稳定的孤子可以在晶格中自由移动。

英文摘要:

The formation of unstaggered localized modes in dynamical lattices can be supported by the interplay of discreteness and nonlinearity with a finite relaxation time. In rapidly responding nonlinear media, on-site discrete solitons are stable, and their broad inter-site counterparts are marginally stable, featuring a virtually vanishing real instability eigenvalue. The solitons become unstable in the case of the slowly relaxing nonlinearity. The character of the instability alters with the increase of the delay time, which leads to a change in the dynamics of unstable discrete solitons. They form robust localized breathers in rapidly relaxing media, and decay into oscillatory diffractive pattern in the lattices with a slow nonlinear response. Marginally stable solitons can freely move across the lattice.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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