During 1999--2001 he was in a postdoctorate position at the university of Toronto, and 2001--6 was senior lecturer at Racah Institute of physics at University of Jerusalem.
2001 was senior lecturer at Racah Institute of physics at University of Jerusalem. This was during 1999. He was 2001 in a postdoctorate position at the university of Toronto. He was 2001 in a postdoctorate position at 2001--6.