Interacting topological quantum chemistry of Mott atomic limits

Topological quantum chemistry (TQC) is a successful framework for identifying noninteracting topological materials, based on the symmetry analysis of Bloch Hamiltonian and reference states known as atomic limits. However, TQC grinds to halt once interactions are included. Here, authors put forward analogous TQC, but employing $n$-particle Green's function techniques indicate topology in interacting systems. Fundamentally, they define class that generalize notion limits, which call Mott The protected states.