| 1985 - 1991 |
Julius-Maximilians-Universität
Würzburg (Lehrstuhl für Theoretische Physik I) |
| 1988 - 1989 |
Department of Physics,
State University of New York at Albany (Condensed Matter Theory Group) |
| 1988 - 1989 |
German-American Fulbright Program Graduate Fellow of the State University of New York |
| 1989 - 1991 |
German National Scholarship Foundation (Studienstiftung des deutschen Volkes) |
| 1994 - 1996 | Minerva-Foundation - Foundation for German-Israeli Scientific Cooperation |
| Deutsche Physikalische Gesellschaft |
| American Physical Society |
| European Physical Society |