Remark on the periodic mass critical nonlinear Schrödinger equation

Details Remark on the periodic mass critical nonlinear Schrödinger equation Remark on the periodic mass critical nonlinear Schrödinger equation

2012-03-28

arxiv.org/abs/1203.6375v1

Mathematics

Analysis of PDEs

10 pages

Scientific paper

We consider the mass critical NLS on $\mathbb{T}$ and $\mathbb{T}^2$. In the $\mathbb{R}^d$ case the Strichartz estimates enable us to show well-posedness of the IVP in $L^2$ (at least for small data) via the Picard iteration method. However, counterexamples to the $L^6$ Strichartz on $\mathbb{T}$ and the $L^4$ Strichartz on $\mathbb{T}^2$ were given by Bourgain (1993) and Takaoka-Tzvetkov (2001), respectively, which means that the Strichartz spaces are not suitable for iteration in these problems. In this note, we show a slightly stronger result, namely, that the IVP on $\mathbb{T}$ and $\mathbb{T}^2$ cannot have a smooth data-to-solution map in $L^2$ even for small initial data.

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