An index for two-dimensional SPT states

• URL: http://arxiv.org/abs/2101.00801v3
• Date: Mon, 11 Oct 2021 23:51:11 GMT
• Title: An index for two-dimensional SPT states
• Authors: Nikita Sopenko
• Abstract summary: We define an index for 2d $G$-invariant invertible states of bosonic lattice systems in the thermodynamic limit for a finite symmetry group $G$. We show that this index is an invariant of SPT phase.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We define an index for 2d $G$-invariant invertible states of bosonic lattice systems in the thermodynamic limit for a finite symmetry group $G$. We show that this index is an invariant of SPT phase.

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