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- W4200629243 abstract "Supersymmetry, originally proposed in particle physics, refers to a dual relation that connects fermionic and bosonic degrees of freedom in a system. Recently, there has been considerable interest in applying the idea of supersymmetry to topological phases, motivated by the attempt to gain insights from the fermion side into the boson side and vice versa. We present a systematic study of this construction when applied to band topology in noninteracting systems. First, on top of the conventional ten-fold way, we find that topological insulators and superconductors are divided into three classes depending on whether the supercharge can be local and symmetric, must break a symmetry to preserve locality, or needs to break locality. Second, we resolve the apparent paradox between the nontriviality of free fermions and the triviality of free bosons by noting that the topological information is encoded in the identification map. We also discuss how to understand a recently revealed supersymmetric entanglement duality in this context. These findings are illustrated by prototypical examples. Our work sheds new light on band topology from the perspective of supersymmetry." @default.
- W4200629243 created "2021-12-31" @default.
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- W4200629243 date "2022-02-24" @default.
- W4200629243 modified "2023-09-26" @default.
- W4200629243 title "Supersymmetric free fermions and bosons: Locality, symmetry, and topology" @default.
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- W4200629243 doi "https://doi.org/10.1103/physrevb.105.085423" @default.
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