空间分数阶非线性薛定谔方程的保结构Fourier拟谱线性隐格式
A structure-preserving Fourier pseudo-spectral linearly implicit scheme for the space-fractional nonlinear Schrödinger equation
摘要：
提出了一种求解空间分数阶非线性薛定谔方程的Fourier拟谱格式。该格式具有线性隐式、保持方程的两个不变量、不受空间和时间步长限制等特点。该方案要求在每个时间步求解一个复对称线性系。为了有效地求解该系统，我们还提出了一定的变量变换和预条件子。
英文摘要：
We propose a Fourier pseudo-spectral scheme for the space-fractional nonlinear Schrödinger equation. The proposed scheme has the following features: it is linearly implicit, it preserves two invariants of the equation, its unique solvability is guaranteed without any restrictions on space and time step sizes. The scheme requires solving a complex symmetric linear system per time step. To solve the system efficiently, we also present a certain variable transformation and preconditioner.
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