%0 Electronic Article %A Kato, Kohtaro %A Naaijkens, Pieter %T An entropic invariant for 2D gapped quantum phases %M RWTH-2018-229607 %P 25 Seiten : Diagramme %D 2018 %F PUB:(DE-HGF)25 %9 Preprint %R 10.48550/ARXIV.1810.02376 %U https://publications.rwth-aachen.de/record/748702