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Stability and instability of standing waves for the fractional nonlinear Schrödinger equations
Journal of Differential Equations ( IF 2.4 ) Pub Date : 2021-05-13 , DOI: 10.1016/j.jde.2021.05.007
Binhua Feng , Shihui Zhu

In this paper, we make a comprehensive study for the orbital stability of standing waves for the fractional Schrödinger equation with combined power-type nonlinearities(FNLS)itψ(Δ)sψ+a|ψ|p1ψ+|ψ|p2ψ=0. We prove that when p2=4sN and a(p14sN)<0, there exist the standing waves of (FNLS), which are orbitally stable. When a=0 and 4sN<p2<4sN2s, we present a new, simpler method to study the strong instability of standing waves. When a=1, 0<p1<p2 and 4sNp2<4sN2s, or a=1 and 4sNp1<p2<4sN2s, or a=1, 0<p1<4sN<p2<4sN2s and λ2Sω(uωλ)|λ=10, we deduce that the ground state standing waves of (FNLS) are strongly unstable by blow-up.



中文翻译:

分数阶非线性薛定ding方程的驻波稳定性和不稳定性

在本文中,我们对结合功率类型非线性FNLS的分数Schrödinger方程的驻波轨道稳定性进行了全面研究。一世Ťψ--Δsψ+一种|ψ|p1个ψ+|ψ|p2个ψ=0 我们证明 p2个=4sñ一种p1个-4sñ<0,存在轨道稳定的(FNLS)驻波。什么时候一种=04sñ<p2个<4sñ-2个s,我们提出了一种新的,更简单的方法来研究驻波的强不稳定性。什么时候一种=-1个0<p1个<p2个4sñp2个<4sñ-2个s, 或者 一种=1个4sñp1个<p2个<4sñ-2个s, 或者 一种=1个0<p1个<4sñ<p2个<4sñ-2个sλ2个小号ωüωλ|λ=1个0,我们推论(FNLS)的基态驻波由于爆炸而非常不稳定。

更新日期:2021-05-14
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