Symmetry-protected topological orders of one-dimensional spin systems with D[subscript 2]+T symmetry
Name
Liu-2011-Symmetry-protected topological orders of one-dimensional spin.pdf
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Author(s)
Liu, Zheng-Xin
Chen, Xie
Wen, Xiao-Gang
Alternative Title
Symmetry-protected topological orders of one-dimensional spin systems with D2+T symmetry
Date Issued
November 2011
Journal
Physical Review B
Publisher
American Physical Society (APS)
Citation
Liu, Zheng-Xin, Xie Chen, and Xiao-Gang Wen. “Symmetry-protected Topological Orders of One-dimensional Spin Systems with D_{2}+T Symmetry.” Physical Review B 84.19 (2011): n. pag. Web. 2 Mar. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
In Liu et al. [ Phys. Rev. B 84 075135 (2011)] we studied eight gapped symmetric quantum phases in S=1 spin chains/ladders which respect a discrete spin rotation D[subscript 2]⊂SO(3) and time reversal T symmetries. In this paper, using a generalized approach, we study all the 16 possible gapped symmetric quantum phases of one-dimensional (1D) integer spin systems with D[subscript 2]+T symmetry. Those phases are beyond Landau symmetry breaking theory and cannot be characterized by local order parameters since they do not break any symmetry. They correspond to 16 symmetry protected topological (SPT) orders. We show that all the 16 SPT orders can be fully characterized by the physical properties of the symmetry protected degenerate boundary states at the ends of a chain segment. So we can measure and distinguish all the 16 SPT orders experimentally. We also show that all these SPT orders can be realized in S=1 spin chain or spin ladder models. The gapped symmetric phases protected by subgroups of D[subscript 2]+T are also studied. Again, all these phases can be distinguished by physically measuring their end “spins.”
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.84.195145
