Dear students, dear colleagues

Unfortunately, this Wednesday's (February 18, 2009) colloquium by

M. Zahid Hasan, Princeton University, US

on the 

Observation of a New Class of Topological Phases of Quantum Matter

has to be cancelled due to unavailability of the speaker.

We apologize!

Gianni Blatter

Tilman Esslinger

Thomas Gehrmann

Andreas Schilling