Time Reversal, SU(N) Yang-Mills and Cobordisms: Interacting Topological Superconductors/Insulators and Quantum Spin Liquids in 3+1D

Meng Guo Harvard University Pavel Putrov Institute for Advanced Study, Princeton Juven Wang Institute for Advanced Study, Princeton

Mathematical Physics mathscidoc:1712.22001

We introduce a web of strongly correlated interacting 3+1D topological superconductors/ insulators of 10 particular global symmetry groups of Cartan classes, realizable in electronic condensed matter systems, and their generalizations. The symmetries include SU(N), SU(2), U(1), fermion parity, time reversal and relate to each other through symmetry embeddings. We overview the lattice Hamiltonian formalism. We complete the list of bulk symmetry-protected topological invariants (SPT invariants/partition functions that exhibit boundary 't Hooft anomalies) via cobordism calculations, matching their full classification. We also present explicit 4-manifolds that detect these SPTs. On the other hand, once we dynamically gauge part of their global symmetries, we arrive in various new phases of $SU(N)$ Yang-Mills (YM) theories, realizable as quantum spin liquids with emergent gauge fields. We discuss how coupling YM theories to time reversal-SPTs affects the strongly coupled theories at low energy. For example, we point out a possibility of having two deconfined gapless time-reversal symmetric $SU(2)$ YM theories at $\theta=\pi$ as two distinct conformal field theories, which although are secretly indistinguishable by gapped SPT states nor by correlators of local operators on oriented spacetimes, can be distinguished on non-orientable spacetimes or potentially by correlators of extended operators.
High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Lattice (hep-lat); Algebraic Topology (math.AT); Topological Phases of Matter; Yang-Mills gauge theories; TQFT; Quantum Field Theories
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  • https://arxiv.org/abs/1711.11587, with 66 pages
@inproceedings{mengtime,
  title={Time Reversal, SU(N) Yang-Mills and Cobordisms: Interacting Topological Superconductors/Insulators and Quantum Spin Liquids in 3+1D},
  author={Meng Guo, Pavel Putrov, and Juven Wang},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20171203060004630785860},
}
Meng Guo, Pavel Putrov, and Juven Wang. Time Reversal, SU(N) Yang-Mills and Cobordisms: Interacting Topological Superconductors/Insulators and Quantum Spin Liquids in 3+1D. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20171203060004630785860.
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