Quantum and non-standard computation: algorithm and hardware design, quantum information, quantum communication and foundations.
1988-1991 - Research Associate, University of Arizona, USA
1991-1993 - Lady Davis Fellow, Technion, Israel.
1993-1995 - Feinberg Fellow, Weizmann Inst. of Science, Israel.
1995-1996 - Humboldt Fellow, Univ. Ulm, Ulm, Germany.
1996-2003 - Faculty (Lecturer through Professor) at School of Informatics, University of Wales.
2003-present - Professor, Department of Computer Science, University of York.