Spread of correlations in long-range interacting quantum systems.

  title={Spread of correlations in long-range interacting quantum systems.},
  author={Philipp Hauke and Luca Tagliacozzo},
  journal={Physical review letters},
  volume={111 20},
The nonequilibrium response of a quantum many-body system defines its fundamental transport properties and how initially localized quantum information spreads. However, for long-range-interacting quantum systems little is known. We address this issue by analyzing a local quantum quench in the long-range Ising model in a transverse field, where interactions decay as a variable power law with distance ∝r(-α), α>0. Using complementary numerical and analytical techniques, we identify three… CONTINUE READING

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