Solving Schrodinger Equation and Computing Density Matrix

I have written two papers about the finite difference time domain (FDTD) method for solving the Schroedinger equation and for computing the single particle density matrix. I have put these papers in the arXiv.org.

[1] arXiv:0712.4317
Title: The Finite Difference Time Domain Method for Computing Single-Particle Density Matrix
Authors: I. Wayan Sudiarta, D. J. Wallace Geldart
Comments: 19 pages, 8 figures

[2] arXiv:0712.4201
Title: Solving the Schrodinger Equation for a Charged Particle in a Magnetic Field using the Finite Difference Time Domain Method
Authors: I. Wayan Sudiarta, D. J. Wallace Geldart
Comments: 8 pages, 4 figures