1. Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
2. Department of Mathematics, University of Surrey, Guildford GU2 7XH, U.K.
3. Yale Quantum Institute, Yale University, New Haven, Connecticut 06511, United States
4. Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
5. Department of Physics, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, United States