Walker-Wang models and axion electrodynamics

Article

关键词: LATTICE GAUGE-THEORIES;    THETA-PARAMETER;    PHASE-STRUCTURE;    STATISTICS;    MONOPOLE;    VACUUM;    FIELDS;   

DOI  :  10.1103/PhysRevB.91.045134

来源: SCIE

【 摘 要 】

We connect a family of gauge theories (Maxwell theories with a magnetoelectric coupling theta = 2 pi k, k is an element of Z) to the family of 3D topological lattice models introduced by Walker and Wang. In particular, we show that the lattice Hamiltonians capture a certain strong-coupling limit of these gauge theories, in which the system enters a gapped (confined) phase. We discuss the relationship between the topological order exhibited by certain of these lattice Hamiltonians and the characteristic electromagnetic response of the symmetry-protected bosonic topological insulator.

【 授权许可】

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