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On blowup solutions to the focusing $L^2$-supercritical nonlinear fractional Schrödinger equation (1802.02891v2)

Published 6 Feb 2018 in math.AP

Abstract: We study dynamical properties of blowup solutions to the focusing $L2$-supercritical nonlinear fractional Schr\"odinger equation [ i\partial_t u -(-\Delta)s u = -|u|\alpha u, \quad u(0) = u_0, \quad \text{on } [0,\infty) \times \mathbb{R}d, ] where $d \geq 2, \frac{d}{2d-1} \leq s <1$, $\frac{4s}{d}<\alpha<\frac{4s}{d-2s}$ and $u_0 \in \dot{H}{s_{\text{c}}} \cap \dot{H}s$ is radial with the critical Sobolev exponent $s_{\text{c}}$. To this end, we establish a compactness lemma related to the equation by means of the profile decomposition for bounded sequences in $\dot{H}{s_{\text{c}}} \cap \dot{H}s$. As a result, we obtain the $\dot{H}{s_{\text{c}}}$-concentration of blowup solutions with bounded $\dot{H}{s_{\text{c}}}$-norm and the limiting profile of blowup solutions with critical $\dot{H}{s_{\text{c}}}$-norm.

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