| Affiliation: | (1) IBM Research Laboratory, 95193 San José, CA, USA;(2) Physikalisches Institut, Universität Bayreuth, D-8580 Bayreuth, Fed. Rep. Germany;(3) Bell Laboratories, Crawford Hill, 07733 Holmdel, NJ, USA;(4) Laboratory of Atomic and Solid State Physics, Cornell University, 14853 Ithaca, NY, USA;(5) Materials Science Center, Cornell University, 14853 Ithaca, NY, USA;(6) MPI für Quantenoptik, D-8046 Garching bei München, Fed. Rep. Germany;(7) Institut für Physikalische Chemie, Universität München, D-8000 München, Fed. Rep. Germany;(8) Faculty of Physics, Sofia University, BG-1126 Sofia, Bulgaria;(9) Leningrad Institute of Fine Mechanics and Optics, Leningrad, USSR;(10) Los Alamos National Laboratory, University of California, 87545 Los Alamos, NM, USA;(11) Angewandte Physik, Johannes-Kepler-Universität Linz, A-4040 Linz, Austria;(12) Philips Forschungslaboratorium Aachen, D-5100 Aachen, Fed. Rep. Germany |
