Entanglement spectra of q-deformed higher spin VBS states

@article{Santos2012EntanglementSO,
  title={Entanglement spectra of q-deformed higher spin VBS states},
  author={Raul A Santos and Francis N. C. Paraan and Vladimir E. Korepin and Andreas Klumper},
  journal={Journal of Physics A},
  year={2012},
  volume={45},
  pages={175303}
}
We calculate the reduced density matrix of a block of integer spin-S’s in a q-deformed valence-bond-solid (VBS) state. This matrix is diagonalized exactly for an infinitely long block in an infinitely long chain. We construct an effective Hamiltonian with the same spectrum as the logarithm of the density matrix. We also derive analytic expressions for the von Neumann and Renyi entanglement entropies. For blocks of finite length, we calculate the eigenvalues of the reduced density matrix by… Expand

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