Interactions in the generalized SSH model produce interacting SPT phases, a sublattice-density-breaking phase, CDW phases, Luttinger liquids, and a gapless SPT phase with protected edge states.
As discussed above, the three symmetry-breaking phases are CDW2, CDW4, and SP, characterized by the local order parame- tersM 2,M 4, andM−defined in Eqs
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Quantum phases in the interacting generalized Su-Schrieffer-Heeger model
Interactions in the generalized SSH model produce interacting SPT phases, a sublattice-density-breaking phase, CDW phases, Luttinger liquids, and a gapless SPT phase with protected edge states.