期刊论文详细信息
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS 卷:483
Blow-up for the 1D nonlinear Schrodinger equation with point nonlinearity I: Basic theory
Article
Holmer, Justin1  Liu, Chang1 
[1] Brown Univ, Providence, RI 02912 USA
关键词: Singularity formation;    Blow-up;    Nonlinear partial differential equation;    Nonlinear Schroedinger equation;    Point interaction;    Concentrated nonlinearity;   
DOI  :  10.1016/j.jmaa.2019.123522
来源: Elsevier
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【 摘 要 】

We consider the 1D nonlinear Schrodinger equation (NLS) with focusing point nonlinearity, i partial derivative(t)Psi + partial derivative(2)(x)Psi + delta vertical bar Psi vertical bar(p-1)Psi = 0, (0.1) where delta = delta(x) is the delta function supported at the origin. In this work, we show that (0.1) shares many properties in common with those previously established for the focusing autonomous translationally-invariant NLS i partial derivative(t)Psi + Delta Psi + vertical bar Psi vertical bar(p-1)Psi = 0. (0.2) The critical Sobolev space H-sigma c for (0.1) is sigma(c) = 1/2 - 1/p-1, whereas for (0.2) it is sigma(c) = d/2 - 2/p-1. In particular, the L-2 critical case for (0.1) is p = 3. We prove several results pertaining to blow-up for (0.1) that correspond to key classical results for (0.2). Specifically, we (1) obtain a sharp Gagliardo-Nirenberg inequality analogousto Weinstein [44], (2) apply the sharp Gagliardo-Nirenberg inequality and a local virial identity to obtain a sharp global existence/blow-up threshold analogous to Weinstein [44], Glassey [17] in the case sigma(c) = 0 and Duyckaerts, Holmer, & Roudenko [12], Guevara [18], and Fang, Xie, & Cazenave, [13] for 0 < sigma(c) < 1, (3) prove a sharp mass concentration result in the L-2 critical case analogous to Tsutsumi [43], Merle Tsutsumi [36] and (4) show that minimal mass blow-up solutions in the L-2 critical case are pseudoconformal transformations of the ground state, analogous to Merle [28]. (C) 2019 Published by Elsevier Inc.

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