1. D. Avnir is in the Institute of Chemistry and the Lise Meitner Minerva Center for Computational Quantum Chemistry, Hebrew University of Jerusalem, Jerusalem 91904, Israel..
2. O. Biham and O. Malcai are in the Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
3. D. Lidar is in the Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel
4. Department of Chemistry, University of California, Berkeley, CA 94720, USA