Stripping the planar quantum compass model to its basics

@article{Sur2021StrippingTP,
  title={Stripping the planar quantum compass model to its basics},
  author={Soumya Sur and Mukul S. Laad and S. R. Hassan},
  journal={Physical Review B},
  year={2021},
  volume={103}
}
We introduce a novel mean field theory (MFT) around the exactly soluble two leg ladder limit for the planar quantum compass model (QCM). In contrast to usual MFT, our construction respects the stringent constraints imposed by emergent, lower (here $d=1$) dimensional gauge like symmetries of the QCM. Specializing our construction to the QCM on a periodic 4-leg ladder, we find that a first order transition separates two mutually dual Ising nematic phases, in good accord with state-of-the-art… Expand

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