Walker-Wang models and axion electrodynamics
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
Abstract
We connect a family of gauge theories (Maxwell theories with a magnetoelectric coupling θ=2πk,k∈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.
Details
Original language | English |
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Article number | 045134 |
Number of pages | 23 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 91 |
Issue number | 4-15 |
Publication status | Published - 26 Jan 2015 |