Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions
We study Abelian braiding statistics of loop excitations in three-dimensional gauge theories with fermionic particles and the closely related problem of classifying 3D fermionic symmetry-protected topological (FSPT) phases with unitary symmetries. It is known that the two problems are related by tur...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2018-03-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.8.011054 |
| _version_ | 1819004591413395456 |
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| author | Meng Cheng Nathanan Tantivasadakarn Chenjie Wang |
| author_facet | Meng Cheng Nathanan Tantivasadakarn Chenjie Wang |
| author_sort | Meng Cheng |
| collection | DOAJ |
| description | We study Abelian braiding statistics of loop excitations in three-dimensional gauge theories with fermionic particles and the closely related problem of classifying 3D fermionic symmetry-protected topological (FSPT) phases with unitary symmetries. It is known that the two problems are related by turning FSPT phases into gauge theories through gauging the global symmetry of the former. We show that there exist certain types of Abelian loop braiding statistics that are allowed only in the presence of fermionic particles, which correspond to 3D “intrinsic” FSPT phases, i.e., those that do not stem from bosonic SPT phases. While such intrinsic FSPT phases are ubiquitous in 2D systems and in 3D systems with antiunitary symmetries, their existence in 3D systems with unitary symmetries was not confirmed previously due to the fact that strong interaction is necessary to realize them. We show that the simplest unitary symmetry to support 3D intrinsic FSPT phases is Z_{2}×Z_{4}. To establish the results, we first derive a complete set of physical constraints on Abelian loop braiding statistics. Solving the constraints, we obtain all possible Abelian loop braiding statistics in 3D gauge theories, including those that correspond to intrinsic FSPT phases. Then, we construct exactly soluble state-sum models to realize the loop braiding statistics. These state-sum models generalize the well-known Crane-Yetter and Dijkgraaf-Witten models. |
| first_indexed | 2024-12-20T23:39:20Z |
| format | Article |
| id | doaj.art-c1849503ce4045369a60cb1ed8872741 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-20T23:39:20Z |
| publishDate | 2018-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-c1849503ce4045369a60cb1ed88727412022-12-21T19:23:07ZengAmerican Physical SocietyPhysical Review X2160-33082018-03-018101105410.1103/PhysRevX.8.011054Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three DimensionsMeng ChengNathanan TantivasadakarnChenjie WangWe study Abelian braiding statistics of loop excitations in three-dimensional gauge theories with fermionic particles and the closely related problem of classifying 3D fermionic symmetry-protected topological (FSPT) phases with unitary symmetries. It is known that the two problems are related by turning FSPT phases into gauge theories through gauging the global symmetry of the former. We show that there exist certain types of Abelian loop braiding statistics that are allowed only in the presence of fermionic particles, which correspond to 3D “intrinsic” FSPT phases, i.e., those that do not stem from bosonic SPT phases. While such intrinsic FSPT phases are ubiquitous in 2D systems and in 3D systems with antiunitary symmetries, their existence in 3D systems with unitary symmetries was not confirmed previously due to the fact that strong interaction is necessary to realize them. We show that the simplest unitary symmetry to support 3D intrinsic FSPT phases is Z_{2}×Z_{4}. To establish the results, we first derive a complete set of physical constraints on Abelian loop braiding statistics. Solving the constraints, we obtain all possible Abelian loop braiding statistics in 3D gauge theories, including those that correspond to intrinsic FSPT phases. Then, we construct exactly soluble state-sum models to realize the loop braiding statistics. These state-sum models generalize the well-known Crane-Yetter and Dijkgraaf-Witten models.http://doi.org/10.1103/PhysRevX.8.011054 |
| spellingShingle | Meng Cheng Nathanan Tantivasadakarn Chenjie Wang Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions Physical Review X |
| title | Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions |
| title_full | Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions |
| title_fullStr | Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions |
| title_full_unstemmed | Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions |
| title_short | Loop Braiding Statistics and Interacting Fermionic Symmetry-Protected Topological Phases in Three Dimensions |
| title_sort | loop braiding statistics and interacting fermionic symmetry protected topological phases in three dimensions |
| url | http://doi.org/10.1103/PhysRevX.8.011054 |
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