QUANTUM DYNAMICS SIMULATION OF FEW-BODY COULOMB-SYSTEMS

This paper describes a parallel algorithm for quantum dynamics simulat ions of three body Coulomb problems. The algorithm has been implemente d on a SIMD (single instruction multiple data) computer (MasPar MPI). The algorithm employs the finite-difference and split operator (FD-SPO ) method and variable time-step technique. A transformation of wavefun ction to polar coordinates and a modified finite-difference method are introduced to reduce the number of the dimension and to handle singul arities. The variable-time-step scheme improves the efficiency four ti mes.