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Title:

Higher-order entanglement and many-body invariants for higher-order topological phases

Document type:
Zeitschriftenaufsatz
Author(s):
You, Yizhi; Bibo, Julian; Pollmann, Frank
Abstract:
We discuss how strongly interacting higher-order symmetry protected topological (HOSPT) phases can be characterized from the entanglement perspective: First, we introduce a topological many-body invariant which reveals the noncommutative algebra between a flux operator and Cn rotations. We argue that this invariant denotes the angular momentum carried by the instanton which is closely related to the discrete Wen-Zee response and the fractional corner charge. Second, we define a new entanglement...     »
Journal title:
Physical Review Research 2020-08
Year:
2020
Journal volume:
2
Journal issue:
3
Fulltext / DOI:
doi:10.1103/physrevresearch.2.033192
Publisher:
American Physical Society (APS)
E-ISSN:
2643-1564
Date of publication:
04.08.2020
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