Highly accurate numerical schemes for multi-dimensional space variable-order fractional Schrödinger equations.

As a natural generalization of the fractional Schrdinger equation, the variable-order fractional Schrdinger equation has been exploited to study fractional quantum phenomena. In this paper, we develop an exponentially accurate JacobiGaussLobatto collocation (JGL-C) method to solve the variable-order fractional Schrdinger equations in one dimension (1D) and two dimensions (2D). In this method, the aforementioned problem is reduced to a system of ordinary differential equations (ODEs) in the time variable. As a result, we propose two efficient schemes for dealing with the numerical solutions of initial value problems for nonlinear system of ordinary differential equations, one based on the implicit RungeKutta (IRK) method of fourth order and the other based on JacobiGaussRadau collocation (JGR-C) method. The validity and effectiveness of the two methods are demonstrated by solving three numerical examples in 1D and 2D. The convergence of the methods is graphically analyzed. The results demonstrate that the proposed methods are powerful algorithms with high accuracy for solving the variable-order nonlinear partial differential equations.