Séminaire Physique mathématique ICJ

Winding numbers, spectral flow and relative edge invariants for unbounded operators - Part 4

by Johannes Kellendonk

112 (Bâtiment Braconnier)


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.