Construction of quasi-periodic solutions for the quintic Schrödinger equation on the two-dimensional torus $\mathbb {T}^2$
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- by Min Zhang and Jianguo Si PDF
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Abstract:
In this paper, we develop an abstract KAM (Kolmogorov-Arnold-Moser) theorem for infinite dimensional Hamiltonian systems. As an application of the theorem, we study the quintic nonlinear Schrödinger equation on the two-dimensional torus \begin{equation*} {\mathrm {i}}u_{t}-\Delta u + {|u|}^4u = 0,\quad x\in \mathbb {T}^2\coloneq \mathbb {R}^2/(2\pi \mathbb {Z})^2,\quad t\in \mathbb {R}. \end{equation*} We obtain a Whitney smooth family of small-amplitude quasi-periodic solutions for the equation. The overall strategy in the proof of the KAM theorem is a normal form techniques sparsing angle-dependent terms, which can be achieved by choosing the appropriate tangential sites. The idea in our proof comes from Geng, Xu, and You [Adv. Math. 226 (2011), pp. 5361–5402], which however has to be substantially developed to deal with the equation above.References
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Additional Information
- Min Zhang
- Affiliation: College of Science, China University of Petroleum, Qingdao, Shandong 266580, People’s Republic of China
- ORCID: 0000-0002-2503-1650
- Email: zhangminmath@163.com
- Jianguo Si
- Affiliation: School of Mathematics, Shandong University, Jinan, Shandong 250100, People’s Republic of China
- Email: sijgmath@sdu.edu.cn
- Received by editor(s): January 8, 2020
- Received by editor(s) in revised form: July 23, 2020, and September 19, 2020
- Published electronically: April 21, 2021
- Additional Notes: The first author was supported in part by NSFC Grant #11701567 and the Fundamental Research Funds for the Central Universities Grant #19CX02048A. The second author was supported in part by NSFC Grant #11971261, #11571201
Corresponding author: Jianguo Si - © Copyright 2021 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 374 (2021), 4711-4780
- MSC (2020): Primary 37K55; Secondary 35Q55
- DOI: https://doi.org/10.1090/tran/8329
- MathSciNet review: 4273175