A simple spectral algorithm for solving large-scale Poisson equation in 2D
We show that it is possible with easy-to-program algorithms to reach spatial resolutions of the order of 108 grid points for computing the electric potential on 2D periodic lattices, such as the Si(111)77 surface. We have used a spectral Fourier technique and parallelized FFTs with OPEN_MP on SGI machines. This method can be easily extended to 3D.
poisson equation open_mp fft-parallelization crystal lattice