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arXiv · 2012.08301

Local dispersive and Strichartz estimates for the Schr{\"o}dinger operator on the Heisenberg group

Hajer Bahouri·Isabelle Gallagher
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Abstract

It was proved by H. Bahouri, P. G{\'e}rard and C.-J. Xu in [9] that the Schr{\"o}dinger equation on the Heisenberg group $\mathbb{H}^d$, involving the sublaplacian, is an example of a totally non-dispersive evolution equation: for this reason global dispersive estimates cannot hold. This paper aims at establishing local dispersive estimates on $\mathbb{H}^d$ for the linear Schr{\"o}dinger equation, by a refined study of the Schr{\"o}dinger kernel $S_t$ on $\mathbb{H}^d$. The sharpness of these estimates is discussed through several examples. Our approach, based on the explicit formula of the heat kernel on $\mathbb{H}^d$ derived by B. Gaveau in [20], is achieved by combining complex analysis and Fourier-Heisenberg tools. As a by-product of our results, we establish local Strichartz estimates and prove that the kernel $S_t$ concentrates on quantized horizontal hyperplanes of $\mathbb{H}^d$.

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Hajer Bahouri, Isabelle Gallagher. 2020-12-15. Local dispersive and Strichartz estimates for the Schr{\"o}dinger operator on the Heisenberg group. https://arxiv.org/abs/2012.08301

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