1. Los Alamos National Laboratory, Theoretical Astrophysics T‐6, Mail Stop B288, Los Alamos, NM 87545, USA
2. Physics and Media Group, MIT Media Laboratory, 20 Ames Street, Cambridge, MA 02139, USA
3. College of Chemistry, D7 Latimer Hall, University of California Berkeley, Berkeley, CA 94720-1460, USA
4. ERATO Quantum Fluctuation Project, Ginzton Laboratory, Stanford University, Stanford, CA 94305, USA