Ingemar Bengtsson

My name is Ingemar Bengtsson, and I have been a lecturer at Fysikum in Stockholm since '93 (and a professor since '00). My previous "career" was at Chalmers, CERN and Imperial College.

This is me (as drawn by Jörgen Hansson in '73)
The research areas that I like the best usually have something to do with geometry. General relativity is a favourite. Most of my work there is on black holes. My strongest prejudice is that the world has four dimensions; this is the direction in which I look for clues about quantum gravity. Then I work on quantum information theory, since the geometry of the space of quantum states is wonderful and rather mysterious. What I find fascinating about relativity and quantum mechanics---as it happens, the two deepest theories we have---is that their basic equations have been around for almost a hundred years, and yet they keep springing conceptual surprises on us. I am looking for the next surprise there, but I do keep a weather eye open on other subjects as well. I note, for instance, that the Standard Model is looking increasingly like a bumblebee: scientists have proved that it naturally cannot fly, but it flies anyway.

The things that are on my mind at the moment are extremal black holes, complementary measurements in quantum mechanics, and the existence of special sets of equiangular vectors in Hilbert space (this translates in the laboratory into a very special kind of measurement).

I am told that some scientists think that there is something queer going on in the Universe while others, on the whole, don't. I tend towards the former viewpoint, but this is probably not apparent from my published papers. Some examples of those are: