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arXiv 2302.09869math-phmath.MPnlin.PS
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非自治耗散非线性薛定谔晶格中的指数稳定呼吸子解

Exponentially stable breather solutions in nonautonomous dissipative nonlinear Schrödinger lattices

Dirk Hennig

AI总结:

本文研究带阻尼和驱动的离散非线性薛定谔方程,证明周期与准周期呼吸子解的存在性,并进一步说明强耗散下全局一致吸引子有限维且由单一指数稳定轨迹构成。

摘要:

我们考虑晶格 $\mathbb{Z}$ 上带阻尼和受迫的离散非线性薛定谔方程。首先,我们分别针对周期驱动和准周期驱动建立了周期呼吸子解与准周期呼吸子解的存在性。值得注意的是,在没有阻尼和驱动的情况下,系统中不可能存在准周期呼吸子。随后,我们证明了该系统耗散动力学存在全局一致吸引子。对于强耗散情形,我们证明全局一致吸引子具有有限分形维数,并且由一条单一轨迹组成,该轨迹被限制在无穷维相空间的一个有限维子空间中,以指数速度吸引相空间中的任意有界集。最后,对于强阻尼和周期(准周期)强迫,单一的周期(准周期)呼吸子解具有有限多个模态,并且是指数稳定的。

英文摘要:

We consider damped and forced discrete nonlinear Schrödinger equations on the lattice $\mathbb{Z}$. First we establish the existence of periodic and quasiperiodic breather solutions for periodic and quasiperiodic driving, respectively. Notably, quasiperiodic breathers cannot exist in the system without damping and driving. Afterwards the existence of a global uniform attractor for the dissipative dynamics of the system is shown. For strong dissipation we prove that the global uniform attractor has finite fractal dimension and consists of a single trajectory that is confined to a finite dimensional subspace of the infinite dimensional phase space, attracting any bounded set in phase space exponentially fast. Conclusively, for strong damping and periodic (quasiperiodic) forcing the single periodic (quasiperiodic) breather solution possesses a finite number of modes and is exponentially stable.

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