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】
Free