Sven Bachmann

While thermal phases of matter (liquid water vs solid ice) are mathematically well understood, the theoretical understanding of ground state phases (at zero temperature) is incomplete. The discoveries of last year’s physics Nobel laureates provide a...

Although integers are ubiquitous in quantum physics, they have different mathematical origins. In this colloquium, I will give a glimpse of how integers arise as either topological invariants or as analytic indices, as is the case in the so-called...