Topological phases from higher gauge symmetry in 3+1 dimensions
Jun 21, 2016
21 pages
Published in:
- Phys.Rev.B 95 (2017) 15, 155118
- Published: Apr 13, 2017
e-Print:
- 1606.06639 [cond-mat.str-el]
View in:
Citations per year
Abstract: (APS)
We propose an exactly solvable Hamiltonian for topological phases in 3+1 dimensions utilizing ideas from higher lattice gauge theory, where the gauge symmetry is given by a finite 2-group. We explicitly show that the model is a Hamiltonian realization of Yetter's homotopy 2-type topological quantum field theory whereby the ground-state projector of the model defined on the manifold M3 is given by the partition function of the underlying topological quantum field theory for M3×[0,1]. We show that this result holds in any dimension and illustrate it by computing the ground state degeneracy for a selection of spatial manifolds and 2-groups. As an application we show that a subset of our model is dual to a class of Abelian Walker-Wang models describing 3+1 dimensional topological insulators.Note:
- 28 pages, 4 figures
- phase: topological
- symmetry: gauge
- Hamiltonian
- topological insulator
- lattice field theory
- partition function
- ground state
- homotopy
- any-dimensional
References(74)
Figures(16)
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