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- W3007544140 abstract "We report the existence of emph{flat bands} in a p-wave superconducting Kitaev ladder. We identify two sets of parameters for which the Kitaev ladder sustains flat bands. These flat bands are accompanied by highly localized eigenstates known as compact localized states. Invoking a Bogoliubov transformation, the Kitaev ladder can be mapped into an interlinked cross-stitch lattice. The mapping helps to reveal the compactness of the eigenstates each of which covers only two unit cells of the interlinked cross-stitch lattice. The Kitaev Hamiltonian undergoes a topological-to-trivial phase transition when certain parameters are fine-tuned. Correlation matrix techniques allow us to compute entanglement entropy of the many-body eigenstates. The study of entanglement entropy affords fresh insight into the topological phase transitions in the model. Sharp features in entanglement entropy when bands cross indicate a deep underlying relationship between entanglement entropy and dispersion." @default.
- W3007544140 created "2020-03-06" @default.
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- W3007544140 date "2020-02-20" @default.
- W3007544140 modified "2023-10-16" @default.
- W3007544140 title "Flat bands and entanglement in the Kitaev ladder" @default.
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- W3007544140 doi "https://doi.org/10.1103/physrevresearch.2.013175" @default.
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