Winding numbers, spectral flow and relative edge invariants for unbounded operators

par Johannes Kellendonk

vendredi 13 oct. 2023, 10:00 → 11:00 Europe/Paris

Fokko du Cloux (Bâtiment Braconnier)

The naive Hatsugai formula which ought to relate bulk with edge topological invariants is violated when using unbounded operators like the Dirac operator to describe the insulator. I will propose some ideas on how to fix this.