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- Theor./Math. Physics Seminar
- Scale separation, topology, and time-reversal invariance
- Omri Gat
- Lewiner, Seminar Room (412)
I will explain how Born-Oppenheimer-like energy surfaces in systems with slow and fast degrees of freedom can acquire non-trivial topology, and how this is affected by time-reversal invariance. I will then analyze time-reversal invariant two-dimensional energy surfaces and show that, in contrast with topological insulators, these are classified by an integer index, and may have a non-zero Chern number.