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- W3100649415 abstract "The classification and lattice model construction of symmetry protected topological (SPT) phases in interacting fermion systems are very interesting but challenging. In this paper, we give a systematic fixed point wave function construction of fermionic SPT (FSPT) states for generic fermionic symmetry group $G_f=mathbb{Z}_2^f times_{omega_2} G_b$ which is a central extension of bosonic symmetry group $G_b$ (may contain time reversal symmetry) by the fermion parity symmetry group $mathbb{Z}_2^f = {1,P_f}$. Our construction is based on the concept of equivalence class of finite depth fermionic symmetric local unitary (FSLU) transformations and decorating symmetry domain wall picture, subjected to certain obstructions. We will also discuss the systematical construction and classification of boundary anomalous SPT (ASPT) states which leads to a trivialization of the corresponding bulk FSPT states. Thus, we conjecture that the obstruction-free and trivialization-free constructions naturally lead to a classification of FSPT phases. Each fixed-point wave function admits an exactly solvable commuting-projector Hamiltonian. We believe that our classification scheme can be generalized to point/space group symmetry as well as continuum Lie group symmetry." @default.
- W3100649415 created "2020-11-23" @default.
- W3100649415 creator A5038921463 @default.
- W3100649415 creator A5046071106 @default.
- W3100649415 date "2020-09-10" @default.
- W3100649415 modified "2023-10-12" @default.
- W3100649415 title "Construction and Classification of Symmetry-Protected Topological Phases in Interacting Fermion Systems" @default.
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- W3100649415 doi "https://doi.org/10.1103/physrevx.10.031055" @default.
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