Entanglement spectra of Heisenberg ladders of higher spin

Schliemann, John ; Läuchli, Andreas M

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Zusammenfassung

We study the entanglement spectrum of Heisenberg spin ladders of arbitrary spin length S in the perturbative regime of strong rung coupling. For isotropic spin coupling the entanglement spectrum is, within first-order perturbation theory, always proportional to the energy spectrum of the single chain with a proportionality factor that is also independent of S. In particular, although the spin ...