Fragility of Symmetry Protected Topological Order on a Hubbard Ladder
arXiv:1412.6814 · doi:10.1103/PhysRevB.91.155128
Abstract
Anfuso and Rosch [Phys. Rev. B 75, 144420 (2007)] showed that the "topological" Haldane phase in a fermionic spin-1/2 ladder can be continuously deformed into a "trivial" phase without explicitly breaking symmetries when local charge fluctuations are taken into account. Within the framework of symmetry protected topological phases, we revisit the model and demonstrate how the Haldane phase can be adiabatically connected to a trivial phase due to charge fluctuations. Furthermore, we show that the Haldane phase remains stable as long as the system is symmetric under particular reflection symmetries.
7 pages, 4 figures
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Cited by in corpus (19)
- One-Dimensional Symmetry Protected Topological Phases and their Transitions
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- Intrinsically Gapless Topological Phases
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- Hubbard model for spin-1 Haldane chains
- Multiversality and Unnecessary Criticality in One Dimension
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- Symmetry-protected Topological Phases in Spinful Bosons with a Flat Band
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