10 citations · 18 across the 4 of their papers we have counts for
4 papers
Local topology for periodic Hamiltonians and fuzzy tori
Nora Doll, Terry Loring, Hermann Schulz-Baldes
A variety of local index formulas is constructed for quantum Hamiltonians with periodic boundary conditions. All dimensions of physical space as well as many symmetry constraints a…
Skew localizer and -flows for real index pairings
Nora Doll, Hermann Schulz-Baldes
Real index pairings of projections and unitaries on a separable Hilbert space with a real structure are defined when the projections and unitaries fulfill symmetry relations invoki…
Approximate symmetries and conservation laws in topological insulators and associated -invariants
Nora Doll, Hermann Schulz-Baldes
Solid state systems with time reversal symmetry and/or particle-hole symmetry often only have -valued strong invariants for which no general local formula is known. F…
Parity flow as -valued spectral flow
Nora Doll, Hermann Schulz-Baldes, Nils Waterstraat
This note is about the topology of the path space of linear Fredholm operators on a real Hilbert space. Fitzpatrick and Pejsachowicz introduced the parity of such a path, based on…