Edward Witten is in Canada this week, giving a series of lectures at the Fields Institute, the mathematics institute at the University of Toronto. He’s also giving a public lecture at the Perimeter Institute in Waterloo.
The first of his lectures in Toronto, on the topic of Relativistic Scattering Theory is now available on-line. It’s a nice, simple explanation of scattering theory, using the “geometric quantization” point of view about quantum field theory. For a quantum theory of a real scalar field, one chooses a complex structure on the space of solutions of the free field equation, making this a priori symplectic infinite dimensional manifold actually a Kahler manifold. Witten’s next two lectures in Toronto will be on “Gauge Symmetry Breaking” and “The Quantum Hall Effect”.
I’m curious what he’ll be promoting in the public event at Perimeter on Wednesday. Will it be string theory? Will anyone ask him about the appalling nonsense his fellow string theorists were spouting there all last week?.