On a fractional Schrödinger equation with periodic potential

On a fractional Schrödinger equation with periodic potential
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关于具有周期势的分数阶薛定谔方程

DOI:
10.1016/j.camwa.2019.03.044
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发表时间:
2019-09
影响因子:
2.9
通讯作者:
Chao Ji
Chao Ji
中科院分区:
数学2区
文献类型:
--
作者:
Fei Fang;Chao Ji

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本文首先考虑分数阶Schrödinger算子(−Δ) s+ V (x)在R N上的谱,其中s∈(0,1),V (x)是连续的,周期的。利用一个新的非局部正规导数,证明了该算子具有纯连续谱,该谱下有界,由闭不相交区间组成。然后,当0属于(−Δ) s+ V (x)的谱隙时,我们利用一个新的联系定理建立了分数阶Schrödinger方程的存在性结果。值得注意的是,我们的问题中的非线性项不满足周期性,对于s= 1的情况,存在性结果是新的。
In this paper, we first consider the spectrum of the fractional Schrödinger operator (− Δ) s+ V (x) on R N, where s∈(0, 1) and V (x) be continuous, periodic in x. Using a new nonlocal normal derivative, we prove that the operator has purely continuous spectrum which is bounded below and consists of closed disjoint intervals. Then when 0 belongs to a spectral gap of (− Δ) s+ V (x), we establish an existence result for the fractional Schrödinger equation via a new linking theorem. It is worth to mention that the nonlinear term in our problem does not satisfy the periodicity and the existence result is even new for the case s= 1.
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