Origin of the slow growth of entanglement entropy in long-range interacting spin systems

@article{Lerose2020OriginOT,
  title={Origin of the slow growth of entanglement entropy in long-range interacting spin systems},
  author={Alessio Lerose and Silvia Pappalardi},
  journal={Physical Review Research},
  year={2020}
}
Long-range interactions allow far-distance quantum correlations to build up very fast. Nevertheless, numerical simulations demonstrated a dramatic slowdown of entanglement entropy growth after a sudden quench. In this work, we unveil the general mechanism underlying this counterintuitive phenomenon for $d$-dimensional quantum spin systems with slowly-decaying interactions. We demonstrate that the semiclassical rate of collective spin squeezing governs the dynamics of entanglement, leading to a… 
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