与Schroedinger算子有关的调和分析
Harmonic analysis related to Schroedinger operators
摘要：
本文综述了薛定谔算子的Littlewood-Paley理论的一些最新进展。我们扩展了作者以前工作中考虑的特殊势的Littlewood-Paley理论。我们阐述我们的方法，考虑潜在的$C^\infty_0$或施瓦茨类在一维。特别是低能量的估计被视为建立一些新的和精细的渐近的特征函数和它们的傅里叶变换。给出了与$H$相关的Besov空间和Triebel-Lizorkin空间的极大函数刻画.然后我们证明了在这些空间上的谱乘子定理，并得到了具有势的波动方程的Lahartz估计。我们还考虑了Hermite和Laguerre情形下的无界位势的类似问题，其位势$V=a|x|^2+b|x|^{-2}$在非线性色散方程的扰动研究中是非常重要的.当我们对热核及其梯度应用高斯上界时，这改进了以前的结果。
英文摘要：
In this article we give an overview on some recent development of Littlewood-Paley theory for Schrödinger operators. We extend the Littlewood-Paley theory for special potentials considered in the authors' previous work. We elaborate our approach by considering potential in $C^\infty_0$ or Schwartz class in one dimension. In particular the low energy estimates are treated by establishing some new and refined asymptotics for the eigenfunctions and their Fourier transforms. We give maximal function characterization of the Besov spaces and Triebel-Lizorkin spaces associated with $H$. Then we prove a spectral multiplier theorem on these spaces and derive Strichartz estimates for the wave equation with a potential. We also consider similar problem for the unbounded potentials in the Hermite and Laguerre cases, whose potentials $V=a|x|^2+b|x|^{-2}$ are known to be critical in the study of perturbation of nonlinear dispersive equations. This improves upon the previous results when we apply the upper Gaussian bound for the heat kernel and its gradient.
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