1. Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
2. Lehrstuhl
fuer Technische Thermodynamik and Erlangen Graduate School in Advanced
Optical Technologies, University Erlangen-Nuremberg, D-91058 Erlangen, Germany
3. School
of Engineering, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
4. School
of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722, Korea