arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.04777math.AP
收藏

双曲空间上薛定谔方程的局部光滑估计

Local smoothing estimates for Schrödinger equations on hyperbolic space

Andrew Lawrie, Jonas Luhrmann, Sung-Jin Oh, Sohrab Shahshahani

摘要:

建立了双曲空间$\mathbb{H}^d$上薛定谔方程的全局时间频率局部光滑估计.在对称的第一和零阶电位,这可能是时间依赖性的,可能很大,并有足够快的多项式衰减的存在下,这些估计被证明了一个本地化的低阶误差。然后,在时间无关的情况下,我们表明,谱条件(即,没有阈值共振)意味着充分的本地平滑估计(没有任何错误),投影后的连续谱。在这个过程中,作为一种手段,本地化的频率,我们开发了一个通用的Littlewood-Paley机制$\mathbb{H}^d$的基础上的热流。我们的结果和技术的动机应用到问题的稳定性的非线性薛定谔型方程$\mathbb{H}^{d}$上的孤波。具体地说,本文中建立的一些估计在作者证明双曲平面上薛定谔映射演化下调和映射的非线性渐近稳定性中起着至关重要的作用;参见[29]。作为方法的鲁棒性的证明,这是基于正交换子方法和基于热流的Littlewood-Paley理论,我们还表明,主要结果是稳定的小的时间依赖的扰动下,包括多项式衰减的二阶,和小的低阶非对称扰动。

英文摘要:

We establish global-in-time frequency localized local smoothing estimates for Schrödinger equations on hyperbolic space $\mathbb{H}^d$. In the presence of symmetric first and zeroth order potentials, which are possibly time-dependent, possibly large, and have sufficiently fast polynomial decay, these estimates are proved up to a localized lower order error. Then in the time-independent case, we show that a spectral condition (namely, absence of threshold resonances) implies the full local smoothing estimates (without any error), after projecting to the continuous spectrum. In the process, as a means to localize in frequency, we develop a general Littlewood-Paley machinery on $\mathbb{H}^d$ based on the heat flow. Our results and techniques are motivated by applications to the problem of stability of solitary waves to nonlinear Schrödinger-type equations on $\mathbb{H}^{d}$. Specifically, some of the estimates established in this paper play a crucial role in the authors' proof of the nonlinear asymptotic stability of harmonic maps under the Schrödinger maps evolution on the hyperbolic plane; see [29]. As a testament of the robustness of approach, which is based on the positive commutator method and a heat flow based Littlewood-Paley theory, we also show that the main results are stable under small time-dependent perturbations, including polynomially decaying second order ones, and small lower order nonsymmetric perturbations.

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。

↑