1. Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794, USA
2. Computational Science Initiative, Brookhaven National Laboratory, Upton, New York 11973, USA
3. Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
4. Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA