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Hidden quantum correlations in the ground states of quasiclassical spin systems

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2024

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Frustrated spin models may lead to the formation of both classical non-collinear spin structures and unique quantum phases including highly entangled quantum spin liquids. Here, we study the entanglement and spatial quantum correlations in linear spin-wave theory around a classical spinspiral ground state. We find that the entanglement between pairs of sites is short-ranged, and is completely absent in certain cases. In contrast, the entanglement hidden in multi-site clusters is peaked close to phase transitions and shows an asymptotic behavior modulated by the period of the magnetic structure. These findings motivate further exploring the connection in the entanglement properties of fully quantum and of quasiclassical spin models.

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ISO 690RÓZSA, Levente, Dennis WUHRER, Sebastian A. DIAZ, Ulrich NOWAK, Wolfgang BELZIG, 2024. Hidden quantum correlations in the ground states of quasiclassical spin systems
BibTex
@unpublished{Rozsa2024Hidde-71490,
  year={2024},
  doi={10.48550/arXiv.2411.08394},
  title={Hidden quantum correlations in the ground states of quasiclassical spin systems},
  author={Rózsa, Levente and Wuhrer, Dennis and Diaz, Sebastian A. and Nowak, Ulrich and Belzig, Wolfgang}
}
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