Reconstruction of the polarization distribution of the Rice-Mele model

Abstract

We calculate the gauge invariant cumulants (and moments) associated with the Zak phase in the Rice-Mele model. We reconstruct the underlying probability distribution by maximizing the information entropy and applying the moments as constraints. When the Wannier functions are localized within one unit cell, the probability distribution so obtained corresponds to that of the Wannier function. We show that in the fully dimerized limit the magnitude of the moments are all equal. In this limit, if the on-site interaction is decreased towards zero, the distribution shifts towards the midpoint of the unit cell, but the overall shape of the distribution remains the same. Away from this limit, if alternate hoppings are finite, and the on-site interaction is decreased, the distribution also shifts towards the midpoint of the unit cell, but it does this by changing shape, by becoming asymmetric around the maximum, as well as by shifting. We also follow the probability distribution of the polarization in cycles around the topologically non-trivial point of the model. The distribution moves across to the next unit cell, its shape distorting considerably in the process. If the radius of the cycle is large, the shift of the distribution is accompanied by large variations in the maximum.

arXiv commentaccepted in Phys. Rev. A

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• Quantum phase transitions from analysis of the polarization amplitude
• Interaction driven polarization shift in the $t-V-V^{\prime }$ lattice fermion model at half filling: emergent Haldane phase
• Variational study of the interacting spinless Su-Schrieffer-Heeger model
• Geometric cumulants associated with adiabatic cycles crossing degeneracy points: Application to finite size scaling of metal-insulator transitions in crystalline electronic systems
• Polarization amplitude near quantum critical points
• Approximate formula for the macroscopic polarization including quantum fluctuations
• Calculating the polarization in bi-partite lattice models: application to an extended Su-Schrieffer-Heeger model
• Superfluid weight and polarization amplitude in the one-dimensional bosonic Hubbard model
• Polarization-based indices in quantum many-body systems: validity and extension beyond one dimension
• Characterizing Real-space Topology in Rice-Mele Model by Thermodynamics