Professor of Theoretical Physics, Stockholm University, Secretary of the Nobel Committee for Physics:
I took my PhD from the Royal Institute of Technology in Stockholm, Department of Theoretical Physics, in 1981, with a thesis that treated the interactions of quarks and gluons for bound states including effects of special relativity. Then, I spent two years at CERN, Geneva, working further on theory of elementary particles. After being employed by Stockholm University (which is still my affiliation), I started to interest myself in astrophysics and cosmology, and in particular the interplay between fundamental particle physics and cosmology. In this field I now lead a group at the Physics Department on "Cosmology, Particle Astrophysics and String Theory", where we develop theory and experiments around two of the most fundamental questions of present day cosmology - that of dark matter, and of dark energy. Present important activities include preparations for the GLAST gamma-ray satellite, to be launched in 2007, and the SNAP supernova cosmology probe which is scheduled for completion some time around 2015. Our group is member of a "centre of excellence" funded by the Swedish Research Council for a 5-year period starting in 2005. I am the author of some 200 research papers and 6 books, for instance the university textbook "Cosmology and Astroparticle Physics" (with my colleauge A. Goobar), published by Praxis/Springer Verlag in 2004.
I was elected Secretary of the Nobel Committee for Physics from 2004. I play the role of a corresponding member of the Council for the Lindau Nobel Laureate Meetings also since 2004, and took part in orgnizing the scientific part of the meeting of Physics Laureates in Lindau in 2004.