No abstract

We have developed a set of techniques for performing large scale ab initio calculations using multigrid accelerations and a real-space grid as a basis. The multigrid methods permit efficient calculations on ill-conditioned systems with long length scales or high energy cutoffs. The technique has been applied to systems containing up to 100 atoms, including a highly elongated diamond cell, an isolated C60 molecule, and a 32atom cell of GaN with the Ga d-states in valence. The method is well suited for implementation on both vector and massively parallel architectures.

No abstract

No abstract

No abstract