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Fermion path integrals and topological phases

2015/08/19 by Edward Witten · 1 voice · 15 citations
Materials Science · Physics and Astronomy · #Atiyah–Singer index theorem #Cohomology #Fermion #Graphene research and applications #Invariant (physics) #Mathematical physics #Path integral formulation #Physics #Pure mathematics #Quantum #Quantum many-body systems #Quantum mechanics #Symmetry (geometry) #Symmetry group #Theoretical physics #Topological Materials and Phenomena #Topological insulator #cond-mat.mes-hall #cond-mat.other #hep-th

paper · pdf · doi:10.1103/revmodphys.88.035001

published as Rev. Mod. Phys. 88, 35001 (2016) · 67 pp plus appendices, minor corrections in v. 2

arxiv published 2015/08/19 · arxiv created 2015/12/19 · openalex publication_date 2016/07/13 · arxiv updated 2016/08/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

Symmetry-protected phases of matter have been at the forefront of condensed matter physics in recent years. Bosonic symmetry-protected phases have been interpreted in terms of anomalies and group cohomology. The present article aims to develop an analogous description of fermionic symmetry-protected phases, such as the topological insulators that have been seen experimentally in 2 or 3 space dimensions. The relevant mathematical concepts include the Atiyah-Singer index theorem and the Atiyah-Patodi-Singer eta invariant.

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